, if you love DIY i'm sure it will be great having your own 'grand design'.
I can recommend these guys for your roofing - http://www.guttercleaninglondon.co.uk/ although they are called 'gutter cleaning london' they do pretty much everything with roofs, respond quickly, and are courteous and friendly.
For the internal stuff, I have already posted a recommendation for London Capital Painters in the tradesmen recommended section - Radek and his team do big or small jobs - ceilings, walls, carpentry - you name it, have years of experience, and Radek is good at managing projects too and has lots of contacts in the business. His number is 07912891266 or you can email him at firstname.lastname@example.org. Saying that, do make sure you get quotes from at least three people and ensure that you check their credentials. I found the building sheriff website (Radek recommended I use it) really useful http://www.buildingsheriff.com/ for checking building quotes.
Good luck! Its always nice to hear that people are doing up the old ladder properties.…