I have used Bill Blacker and Son for new barrels and sleeving, and to be honest, his fit and finish (striking, boring and balance) is the best there is compared to other barrel makers in England. He is entrusted by both H&H and Purdey to do the more 'complex' new barrel orders they receive. The price and timescale he quotes to do a job is accurate with no bull$hit inbetween so you know where you stand from the start of the job.