Rat having a poo? hilarious, I like that one! It's a howling werewolf and is done by Belgium, (Gent to be precise) artist Roa, who has several other pieces in the Peckham vicinity, around london, UK and worldwide. As the pub is run by the same guy who owns the Bishop in East Dulwich, along with many other fine establishments and the former having a mural by local artist Remi/Rough and US artist Augustine Kofie I imagine and personally hope it will be a permanent fixture.