I found a Revo Silverblue:
Mounted to the side of Gatton Hall, near Redhill in Surrey.
Re: Gatton Hall "Revo SilverBlue".
Looking at this picture, the canopy of this lantern actually gives more indication of being one of Metrovick's "Trafford 2" lanterns rather than the Revo SilverBlue, although I stand prepared to be "shot down in flames" if required!
However, in referring to Mr Cornwell's great repository of all things "lantern", the "Trafford 2" model is only listed as a side entry, whilst Revo catered for both types.
That said, if you look at the "streamlining" on the MV canopy casting, there are definite similarities with the Gatton Hall relic. Additionally, it looks like the "Trafford 2" did not possess anything like the fancy reflector system as found in the Revo product either. The Gatton example looks quite empty in this respect, although it may have been modified in the past. A further indication are the pressed horizontal ridges on the bowl.
Like I said, I may be well off the mark on this one, however in view of the recent revelations regarding Meppso's side entry GEC Z8403s which were believed to be available in T/E only, it just goes to show that there is always another lantern configuration yet to be discovered and get on Simon's "Full Range" register.