This is the problem all along that some other UK members including Chris and I have discussed on here (Turbo500) that the EU ratings, whilst they may pressure brands to produce better quality vacuums, are not exactly fair.
The ratings are based on overall efficiency that counts electricity used (but it isn't that exact even if it is based per annum since how can it be possible to even measure how many times a general person uses a vacuum cleaner in a week?) but there are three other ratings such as Filtration, Hard floor performance, carpet performance and then on top a statistical data of "actual" electricity consumption.
No wonder the UK has seen an influx of cordless vacuums recently. Some brands are doing more of them to counteract their mains power vacuums when it comes to the actual ratings given.
Clearly the ratings on the labels are totally subjective when the owner in question finds out the actual performance in their own home. It's not an ideal solution in my mind and buyers will be pushed to fork out lots of money for top rated vacuums, even if they don't want to stray from their previous brand.
Whilst I welcome the law to lower motor watts, I think the labelling goes too far.