Agreed, in fact I have run a repair on IE11 and reset it back to an out of the box state which also removes all addons and TP lists etc (I used this http://support.microsoft.com/kb/923737).

At this point Avast and IE11 seemed happy again and everything worked as I would expect and could browse fine.

What was interesting is that if I try and add each of the TP provides from this link http://www.iegallery.com/trackingprotectionlists, each of them add in fine apart from the 3rd one “Enhanced Privacy” and Avast stops this one and it does not even get added into the list in IE (an IE popup says try again later). So for sure Avast does not like it, if it is the site or a FP in Avast I don’t know but was fun tracking down the problem >:(

Thanks for all the help mind, much appreciated.