For those of us who still use cash there seems to be a flood of fake £5 notes in circulation, when new the fakes are virtually perfect, as they age in circulation they become "worn" down the centre line when folded, using a 1p coin you can scratch off the print from the worn part but not where it's still complete, there's been lots tried to bank them here at the post office.
Here's two fakes that are relatively easy to spot "now" you can see the missing print a real one centre also big Ben is not as reflective

Thanks John

I must admit..I dont recall noticing the BigBen on notes I have handled..

But not used much cash over the last 13 months