About time this thread had a bump!
I also have an ancestral connection (by marriage) to Charles Udall and luckily I recalled reading this thread ages ago. While searching for other entertainers who lodged with some of my other ancestors I found an advertisement which may be of interest - it's dated 25 January
1890. The essential information is...
"Lucky Star"
Played in London and the provinces 632 nights
Miss Emma RainbowAnd powerful company of talented artists now travelling with entirely new scenery painted by Mr E Glindoni of Theatre Royal, West Bromwich.
It goes on to list the scenery painted in Mr Rainbow's patent non-inflammable colour (!) and gives J G Rainbow as the contact address.
I trust that's of interest to you Rainbow, Udall and Theatre Royal devotees

Paul