For work in London you don't really need to provide much more information than say "Battersea" to see if a local provider is willing to offer a price for the job.
Its unlikely we have an active poster that supports the location & your preferred manufacturer but a member may be able to provide a recommendation to co. which will look after you.
I'm form he North of England & do some commercial work in London, after travel & expenses I think I earn the same money as working at home....
I only do it for the turn over & the look of horror when I say please & thank you to bus drivers & good morning sir to traffic wardens..... ect