Right, now it seems to work. Must have been some issue with just passing midnight here in Suisse Romande. So, the change fee is as follows, including CHF0 fare difference: CHF62.00. Obviously it is clearly advantageous to book a new one way for the wished for date (CHF16.95) and no-show for the current existing booking. It's silly, it never used to be like this, but I am no easyJet afficionado, really not (which means I hardly ever fly with them). The CHF62 (or GBP54) change fee is ridiculously high compared to what it used to be, just like the baggage fees have become.