@Lynbarn, To me, that's not a description of freedom of movement. You're trying to suggest that the free movement stops UK consumers from buying from other parts of the world where we might get a better price. We all know that is a bit of a false argument - I can buy that mobile phone I wanted from China just as easily as from the UK, and still get it a lot cheaper now.
It will have customs tariffs on it, but with the best will in the world, whether in or out of the UK, we aren't going to want to allow the import of cheap products willy nilly that might affect UK based industries. We would still put trade tariffs in place. The whole steel example demonstrates this issue. The only real difference between now and then is that it will be the UK that is responsible for setting those tariffs rather than the EU.
What freedom of movement means to people like
@james122 is that if they elect to take a job abroad, whether that's a bar tender in Munich, a finance executive in Paris or a surfing trainer in Portugal, under the current rules they can, exactly as anyone coming to the UK can. They can also go and look for work.
One would expect, at the very least, that in the process of exiting the EU, the UK would become a Schengen Annex II country, meaning Visa-free access to the EU for business or pleasure for 90 days in any 180 day period (but who knows what will end up happening).
If you want to work on the continent for more than 90 days, however, it becomes harder, as you will require sponsorship from a relevant company and have to go through resident permits and apply for a working Visa or a business visa. Much like a non-EU citizen already does coming to the UK. So a lot rests on the negotiations that take place.
The irony of the whole issue is abrupt. We are a country where we have a totally screwed up view of the world. We want controlled immigration from everywhere. But we want everyone of those that we don't want here to buy our goods and to invest in our country to build our industries. Sometimes you just have to shake your head in disbelief!