When Marketing your business sometimes one requires other trades to play a role. For example, if you are a builder you are going to rely on quite a lot of trades besides your own.
The thing is there are simply not enough hours in the day to do everything yourself, therefore it would be a good investment to use other trades for example
The best place to find such trades is yell.com all the trades listed on their website are listed and have been reviewed. Having a review will help determine if they are a reliable and trusted trade, Therefore it is worth visiting yell to find other trades