Should my L322 fuel flap lock?

Hi all.
My P38 died a few weeks ago and I picked up its replacement - a 2007 L322 TDV8 last weekend. On the first of (probably many!) trips to fill it with fuel I noticed that the filler flap does not appear to lock - at all.

My first question is - should it?

Assuming it should lock with the central locking, does anyone know of where the problem is likely to be?

Cheers in advance - as ever.

My 2003 one does - it locks on the Central Locking...

If yours doesn,t it is more than likely the lock actuator is faulty/unplugged/wiring to it is duff

It's unlocking flaps that I have trouble with !!