St Paul’s Cathedral, London, is an Anglican cathedral, the seat of the Bishop of London and the mother church of the Diocese of London. It sits on Ludgate Hill at the highest point of the City of London and is a Grade I listed building. Wikipedia
On Sunday the Cathedral is open for worship only.
The cathedral is open from 8:30-4:30 and will cost and adult £20 admission. There are concessions.visit the website for details:
Photography is not allowed in the cathedral, however there have been at least two ‘Summer Lates’ where entrance does not include access to the galleries but photography is allowed (no flash, no tripod) at a cost of £10.
Nearest tube stations: St Pauls, Mansion House Blackfriars.