Ive got a very sharp pain on my left hand side below my ribs. sort of a the bottom of my waist. basically the middle and left hand side. any idea?

Severe pain needs 2B: Evaluated by a doctor. The possibilities include anything from a muscle spasm to a problem with your kidney or something else such as pancreatitis. Even if the pain comes and goes, if it's severe you deserve to get it checked. I realize you are in the UK, but the emergency services are working even now. You might be waiting for a bit, but better to err toward caution.