Thankas for the confidence vote Lost Lambs- I did call the local (farming) vet but he said there wasn't much point in him coming out!! It was a case of sit and see and that he wouldn't do anything over and above me. I gave him a painkiller injections twice and then a long lasting anti-biotic. Vet advised it mightn't be any harm in giving him another 9 in1 injection to ward off anything that might creep in when he's under the weather.
Thankfully he is well improved- out in the field with the ewes- eating drinking and mixing in. Much steadier on his feet. We're out of the woods thankfully