Sutton 1928 is what it says on the back of this very small print (just over 2″ x 3″), it was covered in dirt (or cigarette smoke?),  which I have cleaned a little using mild soapy water.  I think it is Arthur & Alice (Emily) but not sure who the kids are – possibly Sid & Alf???  Amusingly, the dog, looks a lot like my Jack Russell!