This looks a great deal of the day on Amazon UK. Soundcore Boost £39-99p all day Monday 7th May.
Anker Sound Core Boost 20 W BLUETOOTH SPEAKER WITH Bassup Technology, IPX5 Waterproof, Can be Used As Extra Battery, 20 m Range, Excellent Sound & Bass for iPhone, Mobile Phone and Tablet
I was lucky enough to test this speaker out last year, its fantastic and a good deal at £39-99p. You can see my full review here: