The only one I keep finding with middle name Soley is the one in Gravesend. I can find a Thomas Champion, no middle name, baptised in Chelsea 23 Jan 1780 to a Thomas and Mary.
The Gravesend one looks good to me. It's not that far from London and our ancestors often travelled further than we think. I have a 4 x gt grandfather born in Hertfordshire, moved to Durham and then to Yorkshire.
Emeltom