I have a similar problem.
Benjamin Ward was an innholder in Peterborough in the 1770s, which means he owned it rather than just ran it. He was also a juror at the Quarter Sessions in the 1770s. I've exhausted the archives at the NRO, which have records of some inns in Peterborough, but there's no way of telling which BW owned.
He married twice in the 1770s and later moved to Wisbech, where he died in 1800.
Neither he nor either of his wives were born in Peteborough, and so far I've not been able to find out where he came from.
At the NRO there are some wills of innholders, but none of them show BW inheriting one. One may be relevant to Mark's query.
Has anyone any info which might help tracing BW?