I have removed the large nut and spacer but the wheel won’t come off. Is anything else holding it on or do I need to go at it with a hammer? It has stood for 5 years so I fear its stuck solid

Reattach nut - with it undone 3 or 4 turns.
Put bike on the ground, on the wheels, hit the TYRE from left to right with a large 2 x 4 block of wood at the back of the bike (1 hit - IT DOESN'T NEED TO KNOCK OUT MIKE TYSON) - roll forward 1/4 turn do the same again - repeat around the wheel.. once the wheel has moved so its touching the nut put it back on the stand, undo nut & it should then come off.