Not being a nitpicker - well, not always - I hasten to remind you islanders that Britain is geographically part of Europe, so forget the Britain and Europe thing. Having said that, prices in mainland Europe have been showing a marked difference from those practised in Britain for some years. They have been lower by a considerable amount.
However - and this is the important point - people like Sony have caught on to the disadvantages for national markets of having huge price differentials. Take the example of the Sony BDP 350. While Amazon.de is taking pre-orders at EUR 330, or £270 at the current rate of exchange, it is almost always possible to find better prices than Amazon's. If you are looking for a bargain, there's an Austrian website that carries price comparisons from all over Europe, with a subsite for the German national market showing prices "delivered to Germany" from the whole of the EU.
If you want to take a look, here's the URL:
http://geizhals.at/deutschland/
OK, it's in German, but quite simple. Just enter your product name in the box at the top left, then click on the product name with numbers of offers at the top of the next screen. This will show "base prices" from many international dealers. Payment options change the price you pay. Credit Card payment always adds to the price (with one or two exceptions, such as Amazon.de), so go to the online shop selling the goods at the price you want to pay, and they often will have an English language version to avoid confusion.
Hope this will help the more adventurous of you. By the way, EU consumer protection is the same as in the UK, so you have very little to risk.
Just try to use gthe system to YOUR advantage.