I have to agree with sabrecat. Serena is an amazing lady. I see her often.
Unfortunately, she might not be back in London on those dates. She mentioned last week she would be traveling for a few weeks. Check out her website though. She keeps it well updated.
https://www.preferred411.com/P97980
Another lady worth seeing is Lia Amelia. I saw her once and enjoyed my time with her.
https://www.preferred411.com/P144676
She is near Pimlico but no worries, she'll do outcall. London is so compact, outcalls to your area shouldn't be much of a problem for any of the ladies. Just ask.
If you've never played in London before, you will find it a bit different, but it is easy.
Have fun!