Cap Badge help??

[JoWheat]

Hi,
My uncle served in WW1, but we can find no records of his service.
My father insists that he was in the Wiltshire regiment, but a cousin thinks the London reiment.
I have two photos of him in uniform.
Can anybody look at these two photos and give any clue, please??? Unfortunately the badges themselves are not in focus
Any help much appreciated! Thanks