Are there any part-time schemes available and what do they look like?
There are. The number of duty days is 200. Subtract leave, training etc and you have how many days you should turn up for work.
There are a few part time options. Currently there's 180 days (minus pro rata leave, training etc), 160 days (pro rata etc) and 160 days Seasonal. That is, you do most of the work in Summer (high season, although
Buzzc152 cheekily suggested our high season is now all year - feels like it). There is/was another scheme of 5 months off/7 months on (in the northern hemisphere Summer) but I haven't seen any details on it recently.
I am not sure what the qualifying period is. The bids/requests are open now and allocated soon. The numbers allocated are based on company needs, how many applied, etc.