The UK Tourism Satellite Accounts (UK – TSA) 2016 (2018).

Produced and published by ONS,  UK-TSA provides information about the demand for goods and services associated with the activity of tourists and the relationship of this demand to supply of such goods and services within the UK economy.  The figures produced are different and often far larger than the annual estimates for UK domestic, day visitors and international inbound tourism. Main points and a simple explanation of satellite accounting can be found on page 2:

2018 ONS UK Tourism Satellite Account (UK-TSA) 2016