jackdaw if you see this, then ring the surgery, tell them you have a bp monitor, and would it be possible to calibrate your's to their's. that way if your's is a bit out ,you can make the adjustment
sorry that is an obscure ref to the rock opera - called Tommy I think
starred elton john who um er is starring in London ( the Strand - opposite St Clement Danes - wonderful acoutstic if anyone has been ) this afternoon /week