Here's the latest list, as of 6/11/15:
LOCOS
Class 43 powercars:
002-FGW livery.
003 "ISAMBARD KINGDOM BRUNEL"-FGW livery.
004- "First for the future/First ar gyfer y dyfodol"-FGW livery.
005-FGW livery.
009-FGW livery.
010-FGW livery.
012-Advertising livery: BRISTOL 2015 European Green Capital
015-FGW livery.
016-FGW livery.
017 "Hannahs discoverhannahs.org"-FGW livery.
018-FGW livery.
020 "MTU Power. Passion. Partnership."-FGW livery.
021 "David Austin-Cartoonist"-FGW livery.
022-FGW livery.
023 "SQN LDR Harold Starr One of the Few"-FGW livery.
024 "Great Western Society 1961-2011 Didcot Railway Centre"-FGW livery.
025 "The Institute of Railway Operators 2000-2010 TEN YEARS OF PROMOTING OPERATIONAL EXCELLENCE"-FGW livery.
026 "Michael Eavis"-FGW livery.
027 "Glorious Devon"-FGW livery.
028-FGW livery.
029-FGW livery.
030 "Christian Lewis Trust"-FGW livery.
031-FGW livery.
032-FGW livery.
033 "Driver Brian Cooper 15th June 1947-5th October 1999"-FGW livery.
034 "TravelWatch South West"-FGW livery.
035-FGW livery.
036-FGW livery.
037 "Penydarren"-FGW livery.
040 "Bristol St. Philip's Marsh-FGW livery.
041 "Meningitis Trust Support For Life"-FGW livery.
042-FGW livery.
053 "University of Worcester"-FGW livery.
056 "The Royal British Legion"-FGW livery.
063-FGW livery.
069-FGW livery.
070 "The Corps of Royal Electrical and Mechanical Engineers"-FGW livery.
071-FGW livery.
078-FGW livery.
079-FGW livery.
086-FGW livery.
087 "11 Explosive Ordnance Disposal Regiment Royal Logistics Corps"-FGW livery.
088-FGW livery.
091-FGW livery.
092-FGW livery.
093-FGW livery.
094-FGW livery.
097 "Environment Agency"-FGW livery.
098-FGW livery.
122-FGW livery.
124-FGW livery.
126-Advertising livery: BRISTOL 2015 European Green Capital
127 "Sir Peter Parker 1924-2002 Cotswold Line 150"-FGW livery.
128-FGW livery.
129-FGW livery.
130-FGW livery.
131-FGW livery.
132 "We Save the Children-will you?"-FGW livery.
133-FGW livery.
134-FGW livery.
135-FGW livery.
136-FGW livery.
137 "Newton Abbott 150"-FGW livery.
138-FGW livery.
139 "Driver Stan Martin 25 June 1950-6 November 2004"-FGW livery.
140 "Depo Diesel Glandŵr 1963 Dathlu 50 Mlynedd 2013/Landore Diesel Depot 1963 Celebrating 50 Years 2013"-FGW livery.
141-FGW livery.
142 "Reading Panel Signal Box 1965-2010"-FGW livery.
143 "Stroud 700"-FGW livery.
144-Advertising livery: BUILDING A GREATER WEST (countryside images)
145-FGW livery.
146-Advertising livery: BUILDING A GREATER WEST (coastal images)
147 "Royal Marines Celebrating 350 Years"-FGW livery.
148-Advertising livery: BRISTOL 2015 European Green Capital
149 "University of Plymouth"-FGW livery.
150-FGW livery.
151-FGW livery.
152-FGW livery.
153-FGW livery.
154-FGW livery.
155 "The Red Arrows 50 Seasons of Excellence"-FGW livery.
156 "Dartington International Summer School"-FGW livery.
158-FGW livery.
159-FGW livery.
160 "Sir Moir Lockhead OBE"-FGW livery.
161-FGW livery.
162-FGW livery.
163-Advertising livery: Visit Plymouth
164-FGW livery.
165 "Prince Michael of Kent"-FGW livery.
168-FGW livery.
169 "THE NATIONAL TRUST"-FGW livery.
170-FGW livery.
171-FGW livery.
172 "Harry Patch The Last survivor of the trenches"-Black & orange commemorative livery. FGW logo still present.
174-FGW livery.
175 "GWR-175th Anniversary"-FGW livery.
176-FGW livery.
177-FGW livery.
179 "Pride of Laira"-FGW livery.
180-FGW livery.
181-FGW livery.
182-FGW livery.
183-FGW livery.
185 "Great Western"-FGW livery.
186-FGW livery.
187-New GWR livery.
188-New GWR livery.
189 "RAILWAY HERITAGE TRUST"-FGW livery.
190-FGW livery.
191-FGW livery.
192-Advertising livery: BRISTOL 2015 European Green Capital
193-FGW livery.
194-FGW livery.
195-FGW livery.
196-FGW livery.
197-FGW livery.
198 "Oxfordshire 2007"-FGW livery.
Class 57 sleeper/crank-ex locos:
57602 "Restormel Castle"-FGW livery.
57603 "Tintagel Castle"-GWR (new) livery.
57604 "PENDENNIS CASTLE"-GWR (traditional) livery.
57605 "Totnes Castle"-GWR (new) livery.
COACHES
HST trailer sets:
LA01-Dynamic Lines livery.
LA02-Dynamic Lines livery.
LA03-Dynamic Lines livery.
LA04-Dynamic Lines livery.
LA05-Dynamic Lines livery.
LA06-Dynamic Lines livery.
LA07-Dynamic Lines livery.
LA08-Dynamic Lines livery.
LA09-Dynamic Lines livery.
LA10-Dynamic Lines livery.
LA11-Dynamic Lines livery.
LA12-Dynamic Lines livery.
LA13-Dynamic Lines livery.
LA14-Dynamic Lines livery.
LA15-New GWR livery.
LA16-Dynamic Lines livery.
OC30-Dynamic Lines livery.
OC31-Dynamic Lines livery.
OC32-Dynamic Lines livery.
OC33-Dynamic Lines livery.
OC34-Dynamic Lines livery.
OC35-Dynamic Lines livery.
OC36-Dynamic Lines livery.
OC37-Dynamic Lines livery.
OC38-Dynamic Lines livery.
OC40-Dynamic Lines livery.
OC41-Dynamic Lines livery.
OC42-Dynamic Lines livery.
OC43-Dynamic Lines livery.
OC44-Dynamic Lines livery.
OC45-Dynamic Lines livery.
OC46-Dynamic Lines livery.
OC47-Dynamic Lines livery.
OC48-Dynamic Lines livery.
OC49-Dynamic Lines livery.
OC50-Dynamic Lines livery.
OC51-Dynamic Lines livery.
OC52-Dynamic Lines livery.
OC53-Dynamic Lines livery.
OC54-Dynamic Lines livery.
OC55-Dynamic Lines livery.
OC56-Dynamic Lines livery.
OC57-Dynamic Lines livery.
LA60-Dynamic Lines livery.
LA61-Dynamic Lines livery.
LA62 currently at Kilmarnock for relivery.
LA63-Dynamic Lines livery.
LA64-Dynamic Lines livery.
LA71-Dynamic Lines livery.
LA72-Dynamic Lines livery.
LA73-Dynamic Lines livery.
LA74-Dynamic Lines livery.
LA75-Dynamic Lines livery.
LA spares: 40 (119, 231, 718, 811), 41 (004, 103, 116, 137, 176), 42 (049, 083, 095, 101, 102, 196, 294, 356, 381), 44 (002, 059, 083)
OO spare: 44024
PM spare: 44100
Sleeper coaches: (FGW dynamic lines unless stated as GWR silver & green)
10217, 10219 , 10225, 10232, 10532, 10534, 10563, 10584, 10589, 10590, 10594, 10596, 10601, 10612, 10616, 12100, 12142, 12161, 17173, 17174, 17175
DMUs
Class 143s, 153s and 150/1s are not included here, as they are expected to leave the franchise.
Class 150/2:
202-FGW livery.
216-FGW livery.
219-FGW livery.
221-FGW Local Lines livery.
232-New GWR livery. Currently at Wolverton.
233-FGW Local Lines livery.
234-FGW Local Lines livery.
238-FGW livery.
239-FGW Local Lines livery.
243-FGW Local Lines livery.
244-FGW Local Lines livery.
246-FGW Local Lines livery.
247-FGW Local Lines livery.
248-FGW Local Lines livery.
249-FGW Local Lines livery.
261 "The Tarka Line - The First 25 Years 1989-2014"-FGW livery.
263-FGW Local Lines livery.
265-FGW Local Lines livery.
266-FGW Local Lines livery.
Class 158
763-FGW Local Lines livery.
766-FGW Local Lines livery.
798-Advertising livery: Springboard Opportunity Group
950-FGW Local Lines livery.
951-FGW Local Lines livery.
952-FGW Local Lines livery.
953-FGW Local Lines livery.
954-FGW Local Lines livery.
955-FGW Local Lines livery.
956-FGW Local Lines livery.
957-FGW Local Lines livery.
958-FGW Local Lines livery.
959-FGW Local Lines livery.
960-FGW Local Lines livery.
961-FGW Local Lines livery.
Class 165 (All currently in FGW Dynamic Lines livery.)
Class 166
201-FGW livery.
202-FGW livery.
203-FGW livery.
204 "Norman Topsom MBE"-New GWR livery.
205-New GWR livery.
206-New GWR livery.
207-FGW livery.
208-New GWR livery.
209-FGW livery.
210-New GWR livery.
211-FGW livery.
212-At Wolverton for Repaint.
213-FGW Dynamic Lines livery.
214-FGW Dynamic Lines livery.
215-FGW livery.
216-FGW Dynamic Lines livery.
217-FGW Dynamic Lines livery.
218-FGW Dynamic Lines livery.
219-FGW Dynamic Lines livery.
220-FGW Dynamic Lines livery.
221 "Reading Train Care Depot"-FGW livery.
Don't hesitate to add in any further changes!