may I recommend www.thebestof.co.uk
find your local area - www.thebestof.co.uk/lewisham
or www.thebestof.co.uk/croydon etc.
some of the sites are new and because it builds slowly upon recommendations you might not always find what you;re looking for. but it does work. also - if you know a good tradesmen you would definitely recommend then go to your local thebestof and recommend them… the idea is to have a a guide with trused businesses on it… and people can leave reviews.