I work in Eastbourne, and I know the shop. There's a good reason why he's put the notice up - because he gets students from language schools buying their fast food at shops nearby and going in his store to sit down and eat it. However, the way he's phrased it seems rather stupid to me. All he has to say is, "No food or drink to be brought into these premises" or something to that effect.

Like much of tourism, the influx of teenagers to the town to attend foreign language schools (and there are lots of them) brings both money and problems. Towns like Eastbourne don't always know to deal with this. The university area, where I work, gets complaints about the occasional behaviour of some students - mainly from retired residents who conveniently forget that, after tourism, students bring in most of the town's revenue.