My mother was born in the UK in 1915 and left for Canada in 1921 and married a Canadian citizen in 1938. Child was born in Canada in 1943. Does child have any right to British passport/citizenship?
British nationality could not be transmitted at birth from a mother to a child born before 1983. However, a child born to a British mother before 1983 is eligible to register as a British citizen now on Form UKM, as long as as he/she would have gotten British citizenship if mothers could transmit citizenship the same as fathers. Basically, this means that the mother had to have been British "otherwise than by descent", which she was in this case, since she was born in the UK.