Oporto

"There is that perception, maybe from the outside and unfounded in many cases, that anyone can be an agent," says Dean Eldredge, who runs Oporto Sports.

PwC in Portugal, Angola and Cape Verde has 1,500 staff and 42 partners, with 26 partners in Lisbon, 12 in Oporto and 4 in Luanda.

The Jewish Community of Oporto – which, along with the Lisbon Jewish community, certifies applicants – said it had received just five applications before the Brexit referendum compared with 400 in the two months following the vote.

According to the Jewish Community of Oporto – which, along with the Lisbon Jewish community, is certifying applicants – demand from the UK has soared since 23 June.

Once back in L.A. aiming to re-create the drink, Mikell tried various ratios of the soda, wine and juice, finding nothing that approximated the taste in Oporto.