As far as the UK employment laws go:
Notice periods
You must be given a notice period before your employment ends.
The statutory redundancy notice periods are:
- at least one week’s notice if employed between one month and 2 years
- one week’s notice for each year if employed between 2 and 12 years
- 12 weeks’ notice if employed for 12 years or more
Check your contract. Your employer may give you more than the statutory minimum, but they cannot give you less.
The "agency" cannot claim back the redundancy payments vis the UK JRS, therefore they will try and keep it to the minimum they think they can get away with. Sadly, the furlough payments will end for the crews.