There is a film called Dave where the US president is in a coma and they get a look a like in to replace him. He goes through the budget with his brother (I think) and applies common sense. I'd like to see this happen.
I'd cut all celebratory events at local level. For our LA I'd start with Christmas and Eid lights and any other religious celebration. The local church/ mosque can pay if they want them.
I'd cut catered lunches in the town hall or la offices especially for staff training.
I'd cut any diversity or inclusion plans that cost to implement across all public funded bodies.
I'd stop LA'S from engaging solicitors and barristers against parents at send tribunals or employing their own in house.
Anyone found driving without a license should have the car taken and sold (unless stolen).
Heavier taxes on second homes.
Stop funding the Royal family but allow them to set up as a business so they could continue to aid the economy and fund themselves but strictly without government funding.
Reverse the NI cut.
Cut all non medically essential treatments on the NHS. No plastic surgery, IVF, trans hormones/ operations.
Any organised marches/ protests that are recurring should fund their own policing eg in situations like the Palistinian marches in London.
Allow some of the universities to go bust and change them to technical schools. Not every young person needs a degree which many will never pay back.