73205 was one of the first 4x class 73s to enter service with GBRf...
73204, 73205, 73206 and 73209 being the first locos to return to service... (overhauled for GBRf at Fragonset Railways at Derby) with 73203 and 73207 stored and used for parts for quite sometime prior to 73207 being returned to service at St. Leonards Depot and 73203 being sold for scrap just last year IIRC, after having all useable parts removed...
73208 was purchased (2007 or 2008 rings a bell) once it was returned to Porterbrook off-lease by Gatwick Express (GBRf had first refusal on all the class 73/2 locos owned by Porterbrook) and ran about for several months in faded Gatwick Express livery prior to being painted in BR Blue...
73207 when returned to service was painted in Large logo but without the BR Arrows for a few months as it was neeeded for shunting at Whitemoor Yard, after which it recieved the BR Arrows at its next trip to St. Leonards
73141, 73212 and 73213 were aquired from network Rail in 2009... reports (about whether the locos were bought outright or exchanged for an extension to a contract) differed magazine to magazine...