What's the advantage of being VAT registered out of curiosity?
Also you get an extra 1% in your first year.
You charge 20% VAT but then you pay 14.5% of the 120% total (i.e. 17.4%).
This may be a good deal if you have relatively few VATable expeneses, and you are charging customers who are insensitive to VAT (you are paying their VAT for them). At best, you're making £52pw rather than £110pw.
It depends who your customers are.