Abuelana I would also suggest AgeUK for their help on this,also if your parents are housed by a Housing Association they have inhouse advisors who will fill in all the relevant forms for them and keep them up to date as to how their claim is progressing they will work out for them what amount of benefits they should receive.
They may also be entitled for fixtures to be made to their property to make for easier living such as handrails/grips for bath/shower well worth looking at.
How much do you spend on yourself?
Bought the wrong Hot Cross Buns 😩
Things you find stressful that other people don't notice.