Independent advice

Where can I get some independent advice on the best solution for my house??

Finding the best solution for your house is a difficult first step towards a warmer, drier, healthier home. Not just your health but the building itself too. You are fortunate to be starting the journey now, whereas when I started over 20 years ago it was largely down to guesswork there are now independent retrofit hubs serving several parts of the country. If you are in the Manchester area I suggest you try People Powered Retrofit.