Red Admiral

You could call your little guest Tetley nightowl, my two in the porch are the Hotters.
The butterflys, bees, birds and insects have given me a lot of entertainment over this year's strange Summer months.
Precious little things need all the help they can get.
I'll update in Spring.

I found one yesterday Buffybee, in my hallway. It is currently in my rear porch in a teabag box (the only thing I could find in a hurry). I did offer it some sugar water on a pad of kitchen roll as I read they might need something to eat if they have been active, but I have no idea whether it drunk any of it. It seems to have gone back to sleep now anyway. Do give us an update in spring.

Ah, thank you for the update.
I love insects, they are so fascinating.

Butterfly update!
When I climbed the ladder to rescue the Red Admiral from my bathroom window blind, I found another one close by.
I now have the ‘couple’, safely in their new shoe box home, on a shelf in the unheated front porch.
Can’t wait for my little guests to emerge in Spring.....

Ah! Thanks MiniMoon, I was worried that it would get too cold on the bathroom window but it might be seeking a cooler place.
I’ll have to try to catch it now, without hurting it.
I’d thought of sugar water Www2 but thought that might wake it up more.

This is advice from the Scottish wildlife Trust,

The best thing you can do if you see a butterfly flying about in your house in the middle of winter is to help it relocate to a cooler spot. Put it in a cardboard box for a while to calm it down and then leave it in your shed, garage or another suitable location. Somewhere cool and dry is ideal.

Sugar water?