The old Blackfriars

A surprising sight walking down to Southwark tube the other day. A
quick shot on my phone in the rain doesn’t really do it justice, but
underneath the railway viaduct is the huge (original?) sign for
Blackfriars station – a small station on the London Bridge – Charing
Cross line that was open at this site for a few years in the 19th
century. The question is – who took the trouble to restore the old
station entrance and sign, and why?