There is an incoming UK passenger list entry that shows a William D. Tatchell arriving in Southampton on the Melita on 25 Jun 1925. He was 23, a farmer and the address in the UK he was going to was Hedbury, Swanage, Dorset.
He returned to Canada on the Minnedosa arriving in Quebec on 24 Jul 1925. He says he had been in Canada from 1914 to 1925 in Marshall, Saskatchewan. He was returning to his wife in Marshall.
There is also an incoming UK passenger list entry that shows Nesta Tatchell, 34, arriving in London on the Alaunia on 20 May 1926. The address she was going to was High Street, Swanage, Dorset. With Nesta was Mary K. (3) and Henry S. (1) Tatchell.
As Kaz mentioned, they returned to Canada arriving in Quebec on the Minnedosa on 20 Aug 1926. Nesta was 34, born in Tottenham, had been in Canada from 1922 to 1926 in Marshall, Saskatchewan. She was going to join her husband, W.D. Tatchell, General Delivery, Winnipeg. She lists the nearest relative in the country from where she came as Mother: Mrs. Kershaw, Rouge Huis, Guernsey, C.I. With Nesta were Mary Kershaw Tatchell, 3, born in Lloydminster and Henry Spencer Tatchell, 1, also born in Lloydminster. The passenger list doesn't indicate whether it was Lloydminster, Saskatchewan or Alberta. Lloydminster is literally on the Alberta/Saskatchewan border with parts of the city in each province.
Another Canadian passenger list entry for William Damon Tatchell aboard the Sicilian which arrived in Saint John, New Brunswick on 29 Mar 1920. He indicates he had been in Canada before from 1914 to 1919 in Marshall, Saskatchewan but his destination was Lloydminster, Alberta.
I'll keep looking for his 1914 passenger list.
Jacquie