By Natasha Wynarczyk We are truly a nation of cuppa-holics… so much so that almost half of us pack tea bags for holidays abroad. Having our beloved brew brand in our luggage is the number one home comfort for overseas getaways, topping a poll on 49%. Despite coffee culture being popular globally, some 38% of us will not leave the country without our favourite flavours. And more than a third of Britons abroad just can not do without their comfiest slippers on holiday. It also appears there is some truth in the trope that the British are averse to expanding their culinary horizons, with ketchu…