Agreed, the scratchings/pickled eggs fit with his 'beer-swilling man-of-the-people' persona,
but I don't see how you get through Dulwich College then a (short) career as a 'trader'/spiv without picking up a wine/spirit habit?
Can't speak for Dulwich but as a trader he would be in the after work beers brigade. His role would rarely have involved the fine wine lunch. If he did develop that habit, it would have been done on expenses in Brussels while not defending the British fishing industry from near collapse.
Peanuts come from US, Africa etc... closer ties, ex commonwealth, new trading relationships and all that. We're still good for peanuts.
But I reckon he's more your pork scratching and a pickled egg kind of guy.