LONDON, 2016-Apr-05 — /Travel PR News/ — Heathrow’s 70th year has seen another significant milestone in the airports history with Terminal 4 turning thirty. Colleagues at Heathrow celebrated the 30th anniversary of its opening on Friday (1/4).Officially opened by His Royal Highness Prince Charles and Princess Diana on Tuesday 1st April 1986, the terminal cost around… Read the full press release