So I called up yesterday on this, looking for three seats at the £17.50 level (which I'd always managed to get, sometimes with a bit of a gentle nudge, as it's more work for the agent).

I was told that a directive had come down with effect from 19 May and the £17.50 level was no longer. And it was 0.50p only, plus a lot more miles when you x 2.

Has anyone had any success booking at the £17.50 level after 19 May ?