Hayes People History. It is hard to imagine that such leaflets were handed out by a "mainstream" political party to the public within my life time (just).
There was of course even worse literature handed out during the same election in Birmingham 1964. This Tory, Peter Griffiths, won but was later defeated in 1966. However, he later went on to become a MP elsewhere for 20 years!
After he won in 1966 according to Kester Brewin "Griffiths was told to be expect to serve his time in Westminster as a ‘political leper,’ – something that enraged Labour MPs to sign a motion that this was “a cruel and unmerited slight on lepers.”