The Royal Albert building on Ashton Road, Lancaster. This impressive structure currently houses an Islamic girls' madressah and boarding school, Jamea Al Kauthar. The school caters for 440 girls who study:
"the traditional sciences concurrently with secondary and further education, offer[ing] the 'Tahfeez Ul Quraan' programme (committing the whole quran to memory) and a two year abridged version of the Islamic Teaching programme in the English medium."
I know little about the school beyond what can be found on their website, although it's a building I'd dearly like to visit. I'll contact them and ask for a tour at some point when school is out, perhaps during the summer.