And just to confuse things even more, a Swales Forrest married a Jane Cunningham in Bradford in 1847 - they were both 19

Swales was an earthenware dealer, as was his father - Swales Forrest. Jane's father was James Cunningham, another earthenware dealer.
So we have
Swailes Forrest, a Grinder, marrying Jane Swailes in Bradford in 1825
Swailes Forrest (bachelor) marrying Jane Cunningham in Sedgefield, Durham in 1827
Swales Forrest marrying a Jane Cunningham in Bradford in 1847, aged 19
And then there's Alice....
Oh, and a Swales Forrest marrying an Elizabeth Wilson, Tabb or Johnson in Ripon in 1842