[gosubpl]

  Wine:
    Best Gascon in London         4d/gallon   1331        [2]     194
    Best Rhenish in London        8d/gallon     "          "       "

This is reversed now, German Riesling much cheaper than Bordeaux.

[UncleSlacky]

At the time, Bordeaux was an English possession (Angevin Empire) so the lack of any complications like import duties would account for the price difference:

https://en.wikipedia.org/wiki/Angevin_Empire