Hi Alison
Working on the basis that Mary would be in the Bushey area, I found this:
RG13/1314/142/30
Charles TROTT H M 36 - general labourer - Bushey Herts
Harriett W M 34 - Edgeware Middx
Mary E dau 13 - ditto Charles W son 11 - Hendon Middx
Sarah Esther dau 7 - Bushey Herts
Lilian E dau 5 - do
Herbert E son 3 - do
Dorothy Ethel dau 1 - do
Address: 35 ?Heckomes Road, Bushey, Hertfordshire
This was the only (Al)Bert I could find with a father Richard in the equine industry!
RG13/139/73/52
Richard W LOVELOCK H M 53 - foreman at horse repository - St Pancras
Mary W M 53 - Herts Bushey
Charles W son U 21 - horsekeeper - St Pancras
Alice M M dau U 19 - machinist at spanish liquorice factory - ditto
Minnie L dau U 16 - machinist at ditto - ditto
Frederick son 9 - East Battersea
Bertie A son 13 - St PancrasGeorge V son 8 - Islington
Kate M dau 8 - ditto
Ada E HICKS dau M 25 - St Pancras
Richard H HICKS grand son 4 - Islington
Ada M HICKS grand dau 6 months - St Pancras
Address: 14 Bidborough St, St Pancras, London
I hope this accords with what you know.
kind regards, Arranroots

Edited to include birthplaces of the TROTTS