Doing a quick look for you, it looks like rodents going into the UK from outside Europe,
quarantine is 4 months, so yeah not worth it.
I would ask your vet if they or anyone they know might be willing to board her for you while you are gone. I know some vet techs will be willing to get some extra hands on experience with chinchillas since they don't see them often.
Depending on where you live there are also some chinchilla rescues that also board chinchillas. As well as pet sitter services that can come to your house to take care of the chinchilla. Most pet sitters only care for cats and dogs, but there are some that do exotics too.
Obviously there is always the friends or family route, if you trust any of them to care for her while you are gone. Since you didn't think of that I'm guessing that is not an option. There are ways to minimize how often the cage is opened, hay feeder that goes on the outside of the cage, pouring food into the bowls from outside, water bottles outside the cage, etc, but the cage will still need to be cleaned while you are gone.