I looked farther into the Gloster VTOL project in my last thread and found there were a few more.
Enjoy
Gloster Aircraft Company experimental VTOL designs 1958-1961 - Album on Imgur
My thoughts on it:
The 1958 entry is really an outlier
497, 504, 505, and 507 are all fighters using Rolls-Royce...
I found this... real or fake?
Seems to be an experimental blueprint-only VTOL aircraft based on Gloster's Meteor T.7 two-seat trainer.
Predates the Hawker P.1127 by a few months (although a lot uglier).