Cashing out LTC in UK

I have no immediate plans to cash out my LTC as I am a long time Hodler and intend to stay one. However, I like to be prepared for the future incase I decide to trade a few during dips etc.

Please could somebody explain the best way for me to sell my LTC to GBP. They are stored in cold storage btw. Would I need to use shapeshift or something to convert them to bitcoin then sell? Or is there a direct method?

PS. I imagine I’d be selling between 10 and 20 coins so not talking huge sums here but significant enough to me.

Any advice warmly received,