Many thanks for this. In the deepest recesses at the back of mind this rings a bell, however, I think it was discounted at the time.

The spelling of Oliver's surname as Mawson hasn't help and the distance of Aston to Abenhall is over 50 miles so I still have doubts about this being correct.

Oliver was a miner living at East Dean at the time of his daughter, Elsie's, baptism in 1898 and by the time of the baptisms of his sons, Oliver & George Felix in 1901 he was a mason.

On top of this Kate's birthplace is given as Aston, Oxfordshire whereas the 1911 Census states East Dean, Gloucestershire.

It seems I'll have to give this some more thought.