No but I did look into it as nearly all the other flats in my close are band A and I'm band B when I enquired I was told it could be a double edged sword as a re-valuation might put it up into a higher bracket and best the devil you know
Have a look at Moneysaving expert.com A site by Martin Lewis. I followed his info and got £600 back for being in too high a band. The value of the property is what it was in 1991 (I think) not what it is now. Very straightforward advice.