Do you know how I would go about buying and filling a muck spreader.

You can hire one from any number of places, like here. I quite like the side discharge spreader for drive-bys as long as you knew the range.

To fill it try a pig farmer as they usually have large ponds of the stuff they want rid of - chicken shit or bull shit are also available for symbolic reasons.

Plus Rishi Sunaks home address would be a totally unrelated useful fact to share.

His home has already been vandalised as I assume the address is in the electoral register. I was quite surprised they got through security and I assume it’s been tightened up since. Driving a large farm vehicle at the house seems quite a good way to get shot.