In short, 150209 has been a hybrid unit since the late 80s / early 90s, when two rather sad and unfortunate incidents meant that the partnering 52XXX (the cars with the toilets fitted) both ended up being written off and scrapped. The two remaining toiletless cars were never really an issue until the breaking up of the Central Trains fleet, as they were both used to bolster up further 150/1s to create the Tyseley 150/0 Hybrid fleets. 209 ended up in storage with 150001 & 002 at Eastleigh, until an enterprising First Great Western took them on and subsequently split 209 up again, with both cars being used to former up 150921 & 150927, laterally 150925 & 150926.