You could consider playing in the High Command group, which play every saturday from 16-23 GMT (That should be for you about 9 or 10 in the morning to about 4 or 5 in the afternoon). We just finished a game, but I'm not sure if we are going to start one right away again next week.
Anyway, I don't represent the group *officially*, but if you are interested you might consider mailing High Command and asking if its okay to join.
If you work sometimes for those hours, that should be ok but you will have to let the group know ahead of time, and won't be able to play anything above the allied minors.