My cat is losing weight very fast she cries for food a lot and I feed her I am worried about he but I cannot afford to take her to local vets. Had her there a few months ago and it cost £60 for an injection any advice was be appreciated.

She may have worms. You should be able to get worm medicine at a pet store or from a vet.

If at ALL possible, though, you need to get her to the vet. There may be something seriously wrong. In the mean time, the dewormer shouldn't hurt her.

Try a dewormer, like hhealth suggested. If that does not work, your kitty needs to go to a vet. It could be anything from a thyroid issue to a kidney issue.