Hi Nik,
Found something on Peter. Born 27Sep1894 at Croxley Green, birth registered Dec quarter 1894 Watford District V.3a P.604. Baptised 04Apr1897 Croxley Green s/o James and Barbara Emma WALKER. 1901 census ref RG13/1321 F.6 P.3 records Peter with his parents at Scots Hill, Croxley Green.
Regards ... Peter