took my bike for a spin tonight to give it a quick check before the weekend. Turns out I had about 5 stiff links in the chain, don't know how really cos I lube it regularly
anyway ended up having to take it off the bike to free them up, it took age's to free them and I didn't have an old chain handy to pull through when I took it off so I'll have to take the casing off tomorrow to get it back on just ordered a new x ring chain & sprockets off ebay but won't get them till mon or tues so will have to do it all again next week, should be good for weekend anyway everything else seemed fine