No problem.
1st time we've booked using the annual passport (we've only been back 2 weeks from our previous trip!).
3 nights B&B at the DC, + Eurotunnel crossing & Halloween Party tickets for 6 people - £500.
Doesn't seem to bad....I think that's about 15% discount on the accommodation.
Strangely, if we'd only stayed for 2 nights, it would have been £509 in total???