Since when has Peru been in Britain?

Our obsession with British, preferably Cornish, asparagus has reached a bit of a low point. On two occasions in supermarkets recently, (one of them we really thought would have higher moral standards), the box said British asparagus, but the bundle itself, on bringing it home on the first occasion, said Peru! When this happened for a second time, no asparagus came home! I wonder if the season here has been very short because of the hard winter and the boxes were not changed in time, but surely this was breaking the Trades Description Act? Hope we have not had the last of the British asparagus already.