This trip report varies from the traditional format. Where things are stated at locations they are stabled or stored there. All other sightings are grouped into the basic routes or services.
Not everything listed was seen by all. The London element of the trip started and ended at Ealing Broadway station. Some names carried by Mainline Loco's and Multiple Units omitted.
All items Standard Gauge unless specified.
All locations are view only, often from passing trains.
* = Assumed.

Bristol Temple Meads.
Morning:
Diesel: 43164. DMU: 150128, 153333, 158958. DEMU: 221137.
Carriage: Mk3: 44078.

Working services out of Paddington.
Diesel: 43009/032/034 Travelwatch Southwest/040/069/155 The Red Arrows/158/163/187/190/198.
DMU: 165102/105/107/118/119/120/122/125/129/131/134/136/137, 166205/208/209/212/216.
EMU: 332001/002/004/005/008/009/013/106, 360202/204.
Carriages: HST: 40204, 42072/360/511/520/561/565, 46008.

Acton Yard.
Morning:
Diesel: 59001 YEOMAN ENDEAVOUR, 66056/094/099/102/106/120/138/150/168.
Wagons: 14359, 17901, 19825/833/846/863/870/879/890/906/911, 320000/12/46/67, 7069551267.

Evening:
Diesel: 59001 YEOMAN ENDEAVOUR, 66056/106/150.
Wagons: 17901, 19846/870, 7069551267.
Road/Rail: Readypower: RR302, RR303 911265-5 - Komatsu PC138 7811.
TXM: 4158 943029-7, 6768 940091-0 - Rexquote Gigarailer 180S301303,
7014 942128-8 - Platform Basket 5380, 7017 942131-2 - Platform Basket RR14 EVO 5333, 7037 942141-1, 7050 942148-6.
Trailers: TXM: RT108 010184-8, RT222 011104-5.
Ballast Brush: TXM: RBB126 000001-6.

Old Oak Common Depot.
Morning:
Diesel: 08483. Battery Electric: Niteq B200/2005*.
Evening:
Diesel: 08483, 57602 Restormal Castle, 57603 Tintagel Castle.

Westbourne Park.
RRV: Amey: 105894 - 912021-1 R269EJO* (off track).
TXM: 7017 942131-2 - Platform Basket RR14 EVO 5333 (on track and later seen at Acton off track).

Working services out of Euston.
Electric: 87002 Royal Sovereign, 90035.
Carriages: Mk2: 6701/06, 9806/10.
Mk3: 10502/508/519/548/553/600/610/613/617/689/719/722.
DEMU: 221107/108/115 Polmadie Depot/143 Auguste Picard.
EMU: 350101/104/105/110/112/113/117/121/122/124/127/129/130, 350232/233/238/251/254/256/259/260/262/264/370/371/373/375/377,
378218/222/224/232, 390006/009/013/390044 Virgin Lionheart/114/115/118 Virgin Princess/121 Virgin Dream/122/123 Virgin Glory/129/131/135 City of Lancaster/136 City of Coventry /141 City of Chester/154 Matthew Finders /155 X men - days of future past/156.

Note: 87002 later stabled on Willesden.

Working through Willesden.
378202+/207+/213/216/219/226/228/229/230/233/234/257.

Camden CS.
EMU: 350105/262/266.
By Travis Perkins, between Queens Park and Kensal Green.
Road/Rail: Readypower: FR622 940140-5.

Willesden Depot.
Diesel: D3671 (09007).
Electric: 86101 Sir William Stanier FRS, 86213*, E3137 86259 Les Ross,
86702, 87002 Royal Sovereign, 92018, 92033.
DMU: 172006/007/102.
EMU: 313121, 378227.
Road/Rail: TXM: 4157 943040-5, 6141 911115-2.
Keltbray: X168MKN 919070-1.

Passing Freight: 66119 on 6Z35 09.47 hrs Acton to Hothfield Siding.
Wagons in consist order (some missed): misses 14349 misses 14353 14372 14359 14346 14362 14380 14363 14347 14348 14370 14356 14358 14352 14361 14350 14364 14368 14379 14373 14354 14360 14374 14369

Willesden EuroTerminal.
Diesel: 66170/510/524.
OTM: 78802/812*/822*/832.
Wagons: Eleven Seacows, Five 704629xxx-x, and several wagons that work with 78802 etc were seen, but all were UID.

Willesden Brent.
OTM: 98008.

Willesden Tamper Sidings.
OTM: Two UID Colas Rail machines.

Wembley Yard.
Diesel: 57311 THUNDERBIRD, 66007 (On 0Z60 Angerstein Wharf to Wembley waiting to access the yard).
Electric: 90020 Collingwood/037 Spirit of Dagenham.
Wagons: 500005 500019 500152 500157 7067236758 and many others.

Passing Freight: 90049 on 4M41 Ipswich to Crewe with wagons (consist incomplete) 608162 608161 608120 608122 608461 608462 93442 608430 607071 607135 608279 93329 641002 640159 640160 640409.

Stonebridge Park Depot.
Diesel: 08617, 08764. EMU: 390001.

Harrow and Wealdstone.
Road/Rail: TXM: 3849 914019-3*, 5632 940152-0, 6124 911112-9,
6798 911210-1.
Trailer: TXM: UID

Working services out of Marylebone
Diesel: 67014, 68015 - Vossloh 2693 of 2014.
DMU: 165002/03/04/06/08/15/16/23/27/29/31/32/35/36/37,
168215/18/19, 172101.
Carriages: Mk3: 10274, 12604/617/618/619/623. DVT: 82303/05.

Engineering Possession on Tube Lines near Neasden.
Diesel: 66714/761 with various UID wagons.
Battery Electric: LU: 20 - Metcam/64, 26 - Metcam/65, 49 - Don L49/74 and possibly one other.
LU OTM: 774.

Wembley Depot (Chiltern).
Diesel: SCAZ (01585) - RH 459518/61.
68008 AVENGER/010/011/012.
DMU: 165005/10/37, 168106/09.
Carriages: Mk3: 11029/031, 12017/043/054/119/606/613/620.
DVT: 82302.
Note: 68010 arrived as 0E68 from Stourbridge between 11.20 hrs and 12.00 hrs approx, and 68008 appeared to be departing at around 12.00 hrs.

Earls Court Depot.
The depot was viewed from the West London Line and nothing at all was visible, with the access track looking unused.

Working services out of St Pancras International.
Diesel: 43054/075/082 Railway Children - The voice for children worldwide/083.
DEMU: 222003 Tornado/009/010/011 Sheffield City Battalion 1914 - 1918/ 014/020.
EMU: 395003 Sir Steve Redgrave/008 Ben Ainsley/011 (Named)/012/016 Jamie Staff/025 Victoria Pendleton/026.
Eurostar: 3009 Remembering Fromelles/010/011/021/022/103/107/108/207/208.
Thameslink services.
EMU: 319001 Driver Mick Winnett/009 Coquelles/013 The Surrey Hills, 319214 319381/385, 319427/430/432/433/434/441/443/444 City of St. Albans/445/450 /453/455/456, 377212/213, 377505/509/513/515/516/517,
387103/106/111/116/122/123/126/128.

Working services out of Kings Cross.
Diesel: 43045/064/307.
Electric: 91116.
EMU: 313028/036/044/058, 317341, 365509/521/524/527.

Hornsey FCC Depot.
EMU: 313033/038/040/046/062, 365508/531/532/536/537/539/540.
Carriage: Mk2: (3381) b/o.
Note: The depot is undergoing major work with lots of lines lifted.
None of the shunters allocated here were visible.

Hornsey Station (not covered under Kings Cross).
Diesel: 66096, 67016/021.

Victoria Mainline Station (not covered under Clapham).
Emu: 375303, 375616, 375705/706/713, 375815, 375901,
377105/107/117/127/143/148, 377405/415/424/429/440/462/470/475,
455806/807/814/818/822/826, 465002/009/015/020/064, 465156/165/171/176, 465239, 465901/902.

Working services through / to Clapham Junction.
Diesel: 37425 on 1Q05 Hither Green to Derby with Departmental carriages 72639* 977974* 975091*.
66172 on 7Y56 Woking to Cliffe Brett Marine at 1 hrs with wagons in consist order: 26801 26577 26573 26617 26620 26638 26543 26555 25841 26554 26563 26598 26639 26629 26658 26603 26633 26670.
DMU: 159002 City of Salisbury/004 Basingstoke and Deane/005 West of England Line/011/012/015/020/021/022/104.
EMU: 377102/03/08/13/14/19/22/24/26/30/32/34/35/36/38/39/51/55/60/62/64
377408/09/12/14/15/16/17/18/19/23/27/31/32/33/34/38/39/48/50/52/56/57/59/ 60/61
377601/04/07/09/10/11/12/13/15/19/20/21/25/26
377701/03/04/06/07
378137+/142+/144+/145+/146/147+/151+/154+
378201+/205+/208+/209+/210+/213/214+/215+/216/220/230/233/256
(+ = 5 car)
442407/09/12/17/20/22/23
444002/09/11/14/18 The Fab 444/19/21/22/23/25/26/29/30/37/40/42/43/45
450002/03/04/05/06/08/10/13/14/17/19/20/24/25/27/30/32/33/34/36/38/42/73/74/75/76/77/81/82/83/84/85/86/87/88/89/91/93/94/96/97/98/99,
450100/02/03/04/07/08/11/12/13/14/15/16/17/18/19/21/22/23/26/27
450544/45/48/50/51/52/53/54/55/56/57/58/64/66/68
5701/02/03/06/07/10/12/14/16/17/19/22/23/25/27/30/33/37/42
5848/49/50/51/52/54/55/57/58/59/60/62/64/65/66/67/68/74
5902/03/04/05/08/10/12/13/16/18/19/20
455801/05/09/13/17/20/21/22/27/28/35/36/37/39/40/42/44
8006/07/12/13/15/17/19/21/23/28
458502/503/504/510/511/520/531/533/535/536

Stabled at Clapham:
EMU: 444041, 450107, 8015, 5724/40, 5906.

Tube Sightings:
Only the lowest numbered vehicle seen in each set is given.
Bakerloo.
4 car sets: 3232/34/36/39/40/42/44/45/48/50/53/59/63/66/99
3362
3 car Sets: 3432/34/37/47/48/49/50/53/54/55/61/62/63/64/65/66
3565
Central.
2-car sets: 91005/009/015/035/037/045/059/087/097/099/107/113/121/139/141/149/157/177/191/207/209/219/251/263/283/311/325/327/345
92014/024/038/050/052/076/090/118/158/202/206/212/216/242/404/418/420/422/426/444/458
Circle / Hammersmith and City / District.
7 car sets: 21309/316/343/369/375/387/389/403/407/413/415/435/441/447, 22439.
D78 3 car sets: 7010/18/19/47, 7119/20, 7505/06/12/14.
Jubilee
3 car sets: 96028/276
4 car sets: 96029/055
Victoria.
4 car sets: 11057/075/076.

Additional Info:

350/3 formations (where noted).
350370: 60143; 60513; 60653; 60153
350371: 60144; 60514; 60654; 60154
350373: 60146; 60516; 60656; 60156
350377: 60150; 60520; 60660; 60160

458/5 formations (where noted).
458502 = 67602; 74421; 74002; 74102; 67702
458503 = 67603; 74441; 74003; 74103; 67703
458504 = 67604; 74451; 74004; 74104; 67704
458511 = 67611; 74435; 74011; 74111; 67711
458531 = 67912; 74458; 74446; 74418; 67913
458533 = 67916; 74453; 74443; 74413; 67917
458535 = 67911; 74455; 74445; 74415; 67915
458536 = 67902; 74456; 74448; 74416; 67906