Correct, ANY warning light including EML has been a failure since Jan 1st. Discussed at length with my local MoT man and caused my 4x4 to go in for MoT on the 30th Dec to avoid an airbag light failure (caused by replacing seats with earlier non-airbag equipped versions).
And to clarify one point raised - if your MoT fails and has also expired, its a grey area about being allowed to drive home afterwards, but if you get the fault fixed within 10 working days then only a partial retest is required.
If it fails but the old MoT is still current, then technically you can still drive because you are NOT guilty of the offence of not having a current MoT - but you MAY WELL be guilty of driving a vehicle in an unroadworthy condition, depending on what failed. This is why its also a grey area when driving home from a failed and expired MoT test.