1971 halfpenny roll

I have this sealed roll of 1971 uk halfpennies which includes an error coin, (I know what your thinking how could she know that) Check the picture out below. What i would like advise on is do i leave it in the roll or remove it.

  Leave it - if the time should come when you sell it, then the value will go up (49 standard coins plus one error). Once the roll is opened then there is little value (apart from the removed error coin).

I'd leave the roll!

Thankyou for the advice, I've put them away for safe keeping.

Simulataneous Numista Team reply!

You have so much more self control than I.