What is the change in producer surplus as a result of the market equilibrium moving from point A to point B in the diagram below?

+£54 thousand+£54\text{ thousand}+£54 thousand
−£54 thousand-£54\text{ thousand}−£54 thousand
−£108 thousand-£108\text{ thousand}−£108 thousand
−£60 thousand-£60\text{ thousand}−£60 thousand