Totally agree, have seen many HMRC suitcase openings at Southampton, mostly evidencing cigarettes. One opening of note showed four large suitcases, two packed full of cigarettes.
How did HMRC know/identify?
One has been lucky over many years, but one does utilise a Luggage Porter, sometimes two, to take luggage, also the occasional barrel, fast track to the waiting taxi, then to assist with the loading.
It would appear the Porters are lucky for us.