Customs and Excises powers are draconian. Splitting into 2 businesses is not allowed for VAT purposes as they take into account combined turnover of all your businesses. When I registered in the late 80's I was very close just as is Lee. I supplied my quarterly figures as they requested. They sent them back and asked for the months to fit in with their system (I was Feb, March, April, they wanted Jan, Feb, March type of change). By altering the figures in this way, I was now £200 over the limit instead of £200 under on the previous 12 months. I had to pay back tax.
Don't be frightened of V.A.T. Lee. It's very easy to learn and administer. It will barely make any difference to your residential customers (usually our biggest fear). The only significant downside to V.A.T registration is cashflow. The bank balance gradually increases during the quarter then WHAM! you're suddenly in overdraught
You won't sleep until you are registered Lee.
Safe and happy cleaning+V.A.T.
Ken