Belstaff, which also kits out current film stars such as George Clooney and Brad Pitt, has produced a limited edition black parka for delegates at the summit.

As in previous collections, "mini-me" pieces adapted from McCartney's main line, such as a camel coat, have been scaled down for children.

Despite being dressed in a thick black coat, the 20-year-old looked happy to have the red aid with him to warm up his hands.