Here are the dtails from Doreen Leat's marriage certificate
At St Mary and St Peter's Roman Catholic Church 28/8/1933
Albert Harold Lock, aged 24, Bachelor, Occupation Seaman in the Royal Navy, living in St Helier, born in St Sampson, Guernsey. Father William John Lock, Plumber
to
Doreen Elizabeth Leat, aged 21, Spinster, no occupation, living and born in St Helier. Father George John Leat, Barman.
Witnesses George Henry Lock and Violet Mary Leat.
As Albert Lock was born in Guernsey I'm afraid I can't help you with him as I don't have access to Guernsey records.
Doreen's parents were as you know George John Leat and Emma Clara Crocker. They married in St Helier on 29/10/1911, he was 35 and she was 22. His father was William Henry Leat and hers was Elias Francis Crocker. The witnesses were Elias Crocker and William Leat.
Looking at the census records and IGI William Henry Leat was born in Ringwood, Hampshire in 1811, the son of John Leat and Charlotte Charlton Smith. This makes him 64 when George John was born. I have looked at George's birth certificate and he was born 22/12/1875 at Seale Street, the son of William Leat and Emily Slader. They seem to have had at least 2 other children, Mary Jane born in 1871 and William. Given their father's age it is perhaps not so surprising that the boys were in the orphanage by 1881, Mary Jane was living with her Aunt, Ann Touzel, William's sister although Emily is still alive. I will have a look at the orphanage admission records next week and see if they shed any more light.
The family that William H Leat is living with in 1891 has the surname Joslin - the Ancestry transcribers weren't too good with Jersey names!
I'm sure all the Leats on the Jersey census records must slot together.
I'm back at the Archive next Tues so I'll do a bit more digging then.