Hi,
This could be coincidence but in 1881 there is a John JONES born London living about 3 miles from William in Northumberland, and he is a gardener,
1881 RG11/5086 f.50 p.21 Longbenton, Northumberland
Billy Pit
Gard not Dom
John JONES Head Wid 80 Landscape Gardener London, Southwark
Regards,
Daisy