International visits, nights and spending by UK and Overseas residents, 1980 to 2016 (2017):

Published by the ONS Tourism Intelligence Unit in May 2017 these Excel data sheets present visits, nights, and spend figures for domestic and international inbound and out bound tourism in 8 different data sheets, all covering the period 1980 to 2016, plus a definition sheet (see standard Excel sheet tabs for details):

2017 ONS travel and tourism 1980 to 2016