Hi gaz thanks for the brush you sent to me (red 1) I will just say it doesnt fit on the gooseneck from gardiner's without a bit of DIY, but after the DIY its a great brush. 
Could you send me a price list please:- nick@shinewindows.co.uk
Hi Nick,if you are using the alloy gooseneck,you will need to adapt it,but with the black plastic adjustable necks all the brushes fit,Gaz