We know the inspection did not end the deal; what remains unclear is whether the lender rejected the buyer or disputed the property’s value. I would verify that first and check completed sales before changing the £811,200 figure.
Meanwhile, the conveyancing material can be refreshed so the property is ready to relist. When offers arrive, compare the amount with evidenced funds, finance progress and chain position, then give buyers a clear date for any missing documents. That avoids both an automatic discount and another open-ended wait.