I find this old maps site really useful
https://www.old-maps.co.uk/#/Map/591788/175201/13/101329The free zoom levels on the 1:2500 map options are quite adequate for my general historical investigations.
(I have never paid/subscribed to assess the higher resolution zoom levels)
You can put the pin, to centre the maps, wherever you want.
It has a full screen button which is useful.
The rectangle button to the left of the full screen button gets rid of the annoying blue background.
There are more map options than appear on the screen, so scroll the map options area up and down to see more.