Not sure how with the strengthening of the £ versus the Euro Husqvarna can explain a general increase in prices, but thats what seems to have happened over the last few months. When I got mine from Willetts they price matched or beat Radmore and Tucker by a few quid, but Radmores price is now £420, an increase of some £30. FRJones are always very keen on price, and they are also showing £420.
Willetts were very helpful and will pricematch, so I'd use the world of power price as a benchmark and either get it from them or Willetts. I liked Willetts service.
If its any consolation, I reckon its a great value brushcutter and you'd have to pay £500+ to get anything else near it.