More evidence that it's always worth looking up in London: this parish marker is above the otherwise uninspiring Costcutter opposite Aldgate station. It marks the border of St Botolph Aldgate; looking through lists of London parishes, I haven't managed to work out 'L&M' but suspect I'm missing something obvious!
As the name (meaning 'old gate') suggests, Aldgate is on the boundary of the City of London and indeed was the site of one of its city gates. Today, the gate is long gone but a City dragon protects his domain.
I was in Aldgate in the hope of seeing another boundary marker, though: one of Ronzo's 'Pity of London' sculptures. These alternatives to the dragon are topped by Crunchy the Credit Crunch Monster and have been erected by the artist to celebrate the end of the credit crunch. Sadly, Aldgate's Crunchy was gone by Sunday morning - taken either by collectors or by offended City of London officials - but the film below records its time welcoming those passing between the City and the east end.