Long story, but anyway here it is.
On Sunday when cleaning the chain, I’ve noticed that couple of links are getting stuck and as I had a long trip coming on Wednesday, decided to replace chain with sprockets. So on Monday morning started looking who could do that and agreed with Pole Position, that they’ll get the parts and fit them on Tuesday and guy will let me know once he orders the parts. On Tuesday I didn’t get any call so decided to check what’s going on and surprise surprise - parts were ordered, but courier delivered them to some other garage in the middle of UK, which means Pole Position can’t help me anymore.
Quick look up on google maps for garages in London and came across FWR of whom I’ve heard on this forum before (mixed reviews). Called them up, got the price instantly (cheaper than Pole Position) and was advised to come and join live queue if I want to get parts fitted today. After two hours I was riding my bike home with new chain and sprockets. Easy and simple.