Hi,
Using
http://www.freebmd.org.uk/cgi/search.pl there is only 1 birth registration for a
Harold William Medcalf, abt 1901.
Harold William Medcalf March Q 1901 Newport P 3a 897.
Looking at his death registration 1987 Derby, his date of birth is given as 29th November
1901. So strictly speaking his birth should have been registered December Q 1901 but
no registration appears. There is however:
March Q 1902 Basford 7b 168
Medcalf Harold William
If the above date of birth is correct he will have missed 1901 Census and will only be in 1911 Census.
As suggested, would purchase his marriage registration certificate, to be certain of his Father's name and occupation.
Spendlove