By Milo Boyd Holidaymakers should look out for seven classic warning signs ofbed bugs when staying in hotels. Of all the common pest infestations in the UK, bed bugs are by far the most disruptive to everyday life. The night-time critters invade bedrooms to drink human blood in a vampiric manner, causing slight reddening of the skin, itchiness and mental anguish. Last year the bed bug population had a big moment when their populations swelled in European capitals such as Paris, where writhing masses of the critters took over hotel rooms and were spotted bursting out of the padded seats of a pu…