According to an Ipsos mori survey taken in 16 different countries and based on online surveys of adults under 65 there was a tendency which suggests an unofficial boycott of British products after Brexit. The Italians were the most inclined to this at 43% from the sample, followed by the Spanish 37% and the Germans 33%. This is not to say that it is a conscious boycott just that if the same product is on offer from another EU country they will take it. British car exporters are noticing this trend already. As for visitors - how are you going to control those so called 'undesirables' coming in without also disadvantaging the millions of EU tourists who visit London every year ? Actually about 20 million people who come, spend their money, and then go - are they still going to come to a place which does not make them feel welcome ? No - they will choose Paris or somewhere else for their long weekend. Then there is the case of all those Americans, Japanese etc. who can come to London as part of a general European trip and just hop from one to the other. The consequences of Brexit could be catastrophic for London's tourist industry. As for the millions which the UK currently makes from language course tourism you can forget it - most of the language schools are already relocating to Ireland or Malta.
With respect mate, your comments on the tourist industry is utter rubbish. I’m willing to bet you £100 that in 5 years time, tourist visit figures will be the same or have increased from what they are now.
It just comes over as scaremongering.