Let’s not forget that for the last couple of years, very few people have been able to go abroad for their holidays. This is the largest amount of people going to France in one time that the UK has ever seen (apart from the D day landings when we were waved through with no checks and no bother!) so the scoundrels have seen an opportunity to chuck a sickie.
In a week or two or three, presumably all those British holidaymakers will be returning home to the UK by the same means. Lets see if there are similar queues in Calais when the UK border agency has to carry out similar checks.