An average of 35 hours a week, working 4 out of 6 days, Monday to Saturday. Sundays are outside the working week and are overtime - paid at time + 35% at GTR. Maximum length of a turn of duty is 9 hours 54 minutes.
Sundays in ( ) brackets below may not always be rostered, it works out about one in three on average, but it could be a late week or an early week when you get rostered it. You can say with seven days notice that you are not available to work a Sunday or you can make yourself available to work an extra Sunday if you want to.
Week 1. (Late) late late Wed RD/Thur RD early early
Week 2. (Early) early early early early Fri RD/Sat RD
Week 3. [Sun] Mon RD/Tues RD late late late late
And so on....
The Sunday with square brackets above [ ] you won't be rostered to work as it's in the middle of your long weekend off, but you can make yourself available to work if you want to.
Unlike other rosters elsewhere, where the change from earlies to lates and vice versa is at the end of each week, the Thameslink side of GTR has the changeover on the Wednesday Thursday rest days or the long weekend, making a run of seven days on each shift (sometimes broken up by a Sunday not rostered).
There will be times when you'd get a period of night shifts, or mid to late morning shifts in the roster as well.
There are 89 mainline turns of duty at Bedford on weekdays. 52 are AM starts. Ten start before 05:00 with the earliest at 02:26 (!), but the start times of AM shifts spread up to 09:50, and then there are a few 11am starts as well.
28 are PM starts from 12:08, with the latest booking on at 18:33 (books off at about quarter to two in the morning). Eight of these finish after midnight with the latest finish being 02:37 book off.
There are nine night turns.
There are also some 'Shed and ferry' turns as well that book on at various times of the day.