I’ve always liked looking at street art and 365 project has made me even more alert to it. This ‘sculpture in the wall’ was already pretty grey so I made it b/w. Uploading it now I realise I don’t know the artist. Might be in the area again today (it’s near St James’s Square in London’s Mayfair) so might be able to find out! Update: just revisited and it’s by Edwin Lutyens I believe.