Academic here, teaching what is generally considered a rigorous subject at a Russell Group university. From what I can see, the drama students I know work considerably harder than my undergraduates and are far more focused on their studies
Another academic here, and a former actor-trainer. A Drama degree is a lot of hard work, and a degree at a conservatoire even more so. Very long hours, and a necessity to be able to understand and demonstrate understanding through both standard academic writing & research, and also through performance.
Extras work won't help, as many PP have said.
If you really wanted to be an actor, where is your work on fringe productions, am-dram, doing adult ed. courses, and so on?
If you want to test your abilities against the other aspirants to the profession, what about auditioning for one of the country's conservatoires? Central School of Speech & drama, RADA, LAMDA, East 15, Royal Welsh School of Speech and Drama, Royal Conservatoire of Scotland ...
You can see how you measure up.
As for your question, OP:
Can anyone give a quick guide on the best drama schools in the uk please? Any location, but specifically for a one year course
The major conservatoires all offer 1 year Masters courses, but generally you need a first degree. If you have the cash for fees, you could try somewhere like the Poor School, in London; or somewhere like Ecole Jacques Lecoq in Paris, or the master teacher, Phillipe Gaulier, also in Paris. With Gaulier you can take 6 week short courses in a number of areas - he trained the founders of Theatre de Complicité, and various other fairly famous actors (Emma Thompson, I think, and also Sacha Baron-Cohen). But he's tough - the number of times I was sent off because I was 'boring.' And I was not the only one.