Bristol & West have a fixed rate of 5.99 until 2010 and 5.89 until 2012 at 85% LTV. Mortgage Express and Birmingham Midshires might be worth looking at too.
if you want the number of my FA in North London, you are welcome to request it. We fear there will be another rise in April and another in August maybe, so I have moved a good few of my BTL's into fixed rates for peace of mind. these rises are costly if you have a good few properties. I have always put down 15% and we are also both self employed. also it would appear that a lot of the good fixed rates are disappearing fast due to high demand from people like me buttoning down the hatches.