I thank my hon. Friend for that point, which is made in the Elliott report. Intelligence-led monitoring is also important. Controls on food coming into this country have been tightened at the airports and seaports. Sniffer dogs have been introduced at
Heathrow, and I have been there and seen them in action. It was extraordinarily impressive to see dogs being able to find little bits of food that were being brought into the country—not intentionally but because somebody had forgotten they had left a ham sandwich in their suitcase or backpack.