Smith & Allan are based in Darlington & blend their own oils for a wide variety of uses, I popped in yesterday to pick up some more of their own branded motorcycle engine oil - it has actually come down in price to around £11 for a proper 5ltr container (1 & 20ltr also available), that IMHO is a steal for quality 10/40 semi synthetic motorcycle specific oil, it meets SL & JASO MA2 spec, although they do other grades I believe
I've been using it for decades for bike, car, commercial & agricultural oils and have no connection with them other than being a satisfied customer.
Thought it was worth a heads up