Just finished notice period, new job has now said they can no longer hire

This is an odd post (in odd times) so please forgive me, but I’ve always found UKPF to be such a helpful subreddit.

My girlfriend lives in London, is a citizen of Taiwan and here on a working holiday visa. She is a barista and last month was job hunting, and got an offer she was really happy with. Tomorrow is her last day at the current job, and she has just been contacted by the new employer to say they can no longer hire her.

She is very upset, and I’m just trying to think of how we can deal with things practically. She has approx 1.5-3 months living costs in savings and I can also support in the short term.

She would like to get another job as soon as possible. However given the situation I know this may be difficult, and almost impossible for a barista role which is her previous experience. On top of this there are restrictions on work taken up due to her type of visa.

If anyone has any advice on this situation - on what jobs are available or likely to be available in London right now, or on any support which might be available for her, it would be really appreciated. I’m just trying to get my head around it and do my own research, but its been very sudden and I’m a bit shaken as its compounding everything else going on right now.