Sorry for delay - been waiting to hear from organisers. Slots we've been allocated are:

11:00 - 11.45
12:15 - 13:00
13:45 - 14:30
15:00 - 15:45

That doesn't necessarily mean we can't have singing outside these slots, but among other activities in the area will be the Grimsby Sea Cadets Marching Band, who might prove a bit distracting! But we're more than willing to give up part of our allocated time for 'open mic' spots - if even vaguely maritime. The alternative is we sing for 3 hours - pass the Vocalzones!

Cheers
Dave