EasyJet have finally got round to updating their website.
Cabin bag changes from Thursday 19th March 2015
All customers can bring ONE cabin bag up to the maximum size of 56 x 45 x 25cm including handles and wheels. Overhead locker space is limited on board the aircraft and on busy flights your cabin bag may have to go in the hold.
If you’re an easyJet Plus cardholder, FLEXI fare or Upfront or Extra Legroom customers then you can bring ONE additional small under seat bag (handbag/Laptop) with a maximum size of 45 x 36 x 20cm which will need to be placed under the seat in front. In order to secure your overhead locker space we recommend that you use easyJet Plus Speedy Boarding to be amongst the first to board the aircraft.
So they have done away with the guaranteed cabin bag and replaced it with one size. Plus and some others get a reasonable sized second bag. They gauges at STN have all been updated.