I was thinking about this a few years ago but because of my dispute with an ex-client I thought about it again.
There's a level where you have to register for VAT - £85k per year - but what is the situation if your fees stay the same and you calculate the VAT as inclusive in your fees. This would put your net fees below the amount in which you are able to de-register. When you de-register then your fees are above the amount you need to register!
What is your solution? Unless you change the amount of work you do or change your prices you would just be in a never ending circle of register, de-register and then register again!