There's a lot more to offshore than just oil. It isn't just all drilling. There's construction, inspection and maintenance of various projects across oil, gas and renewables.
Yes, but why claim when I can work? This will be the first job I've done this year, due to prior jobs being cancelled because of the virus. I can't guarantee that the work I do will still be there at the end of the year never mind into next year. When I won't be able to rely on any government payments.