Portobello Winter Weekends Are Coming! Christmas Trading Opportunities available for 2019 - Portobello Market Christmas Markets This year Portobello will celebrate Christmas over the first four weekends of December bringing festive spirit, workshops, entertainment and shopping to London's iconic Portobello Markets. Visit the Portobello's Markets on Dec 1st-2nd, 8th-9th, 15th-16th  for Christmas Jolly.