Crankshaft pulley bolt - standard or deep socket required?

Next job on my TF is replacing the water pump and timing belt. I've seen mention of possibly needing a deep 22mm hex socket, or can a standard 22mm socket be used?

1.6 engine without AC etc, and I'll be locking the crankshaft via the flywheel using the service tool.

Thanks.

Standard is fine

but hex is good.

Thanks both - picked up hex impact socket and alternator belt from Eurocarparts ( plus OAT coolant at £18.99 for 5L concentrate which seems a good price), timing belt, waterpump, cam lock and flywheel lock arrived from Rimmers, so all set to start on her this evening ( cars are all female for obvious reasons aren't they )