Only in specially marked parking bays; either marked out using different coloured brickwork or painted lines. Take a look at the various places you can park below:
Normal parking
You must park your vehicle in a ‘pay and display’ parking bay.
You must pay for a parking ticket at the machine and clearly display it in your car when you see this sign:
Loading bays denoted by words 'Loading Only' written on road accompanied by dashed lines around loading space:
Loading signs indicate you can use the parking bays only for loading or unloading from your vehicle:
Taxis
Taxis can only wait and pick up people in the bays signed for taxis.
Only taxis can park in marked taxi bays:
Only taxis may park in areas where you see this sign:
Motorcycles
Motorcycles can wait or park in the bays signed with the motorcycle logo free of charge.
However, if a motorcycle waits or parks in a normal pay and display bay, a parking ticket must be bought and displayed.
Only motorcycles or mopeds can parking in these bays:
Disabled badge holders
Disabled badge holders can’t park on the roadside (out of a bay), even though there are no double yellow lines painted on the road.
You can park for up to 3 hours free of charge in a bay signed for ‘disabled badge holders only’. You can also park for any amount of time free of charge in one of the normal ‘pay and display’ parking bays.
Disabled badge holders can wait in loading bays only if you are loading or unloading your vehicle.
Disabled badge holders can not park in bays signed for other specific users (eg taxis).
Only those with a 'blue badge' parking permit can park in disabled bays:
If you have a disabled parking permit, you can park here for 3 hours, but you must not return within the next 3 hours and park here again.
A sign like this tells you that parking restrictions will apply: