Thanks JonBoody!
I misspoke earlier when I said there were none in England. I should have looked at my notes before writing with such authority.

I have found that Ellinor Singleton bap 1760, but the dates of birth of her children (1793, 1803, 1806, 1809) make me hesitant to conclude that she's the woman who married John Dobbins. It is within the realm of possibility, but not a comfortable one, particularly in that historical period.
I think two of the few other Eleanor Singletons in England in the period might be a better chance:
> Ellen Singleton, daughter of John and Isabel Singleton, baptised at Kirkham, Lancs., on 14 December 1762. Abode: Newton
> Ellen Singleton, daughter of Thomas Singleton, baptised at Lancaster St John on 3 July 1767
The 30th Foot was at Liverpool before or around the same time they were in Whitehaven. If they marched from Liverpool to Whitehaven, both Lancaster and Kirkham would have likely been along the route.
Eleanor Dobbins was said to have been born abt 1765 when she was buried in 1736 -- totally unreliable, of course, but it has helped guide my searching. Unfortunately, the St Bees parish register didn't note anything about the couple when they married in 1792 other than the fact that neither were previously married.
I've also seen quite a few Singletons in Irish records in this period, which got me thinking she may have been someone he knew before he was stationed at Whitehaven.
The hunt goes on!
All best,
r.