Help towards covering of fees for her passing and cremation

Hi I'm Glen and my dog is Cataleya,she is blind and has developed a lump on her back leg,as a result she is losing her mobility,I am a carer for my mum and on a low income,the vets have given me a estimate of costs which is in the £600 region, I just don't have enough to cover that,I'm looking for help to give her a dignified send off.

I'm doing this for her as she is in a degree of discomfort,she is on pain meds but is now limited with her movement,I don;t want to loose her but things are beyond my control and I just now want to let her go in peace.