Can highly recommend R.T Builders and Decorators - Radek did our internal refurb (including kitchen) and did a great job - his email is firstname.lastname@example.org phone 07912891266
I fully endorse Radek Tober too (last post) for great communication and high standard of work
We have used Decoracus twice - once to do a side return extension on our flat in Allison Road (2006) and to fit a new bathroom and kitchen in our present Effingham Road home in 2008. It was a few years ago but would definitely recommend them based on our experiences
We recently had a full refurb done by Voytek of Zeko Building Services, that included kitchen work similar to yours. I'd recommend him very highly, as have others on here. His number is 07748 724283.