On Thu, 28 Jun 2018 04:07:24 -0700 (PDT), Ding Bat
wrote:

Heathrow Airport is one of the largest employment sites in London with over 76,600 people working within the Airport boundary creating gross value added (GVA) of almost £3.3 billion
http://www.airpor****ch.org.uk/2014/...-charge-rises/

With 231 gates, that's over 300 employees per gate or over 150 employees per gate per shift assuming an average of 2 shifts.

Where are all these employees? I haven't noticed anywhere near 150 employees per gate.

My guess would be at least 3 shifts but that doesn't really answer
your question.

The total probably includes cargo handling staff (the BA site is on
the south side adjacent to T4), maintenance staff (who will work in
the hangars by Hatton Cross and also on the ramps). Then there's
customs and immigration (some customs people will be in cargo), Post
Office, terminal cleaners, air traffic controllers in the tower,
police, shops staff in the terminals, security (also includes people
who search aircraft before boarding to ensure nothing untoward is
leaft on board), fire and rescue (the airport equipment), aircraft
cleaners, fuellers, aircraft toilet tanker drivers, water tanker
drivers, catering staff both preparing and loading food. At least
one of the BA hangars has offices on top, checkin, people to maintain
the various electricals, computers, comms kit (you'd be amazed how
much of that there is). The car park attendants and bus drivers.

The point is that a lot of the staff are hidden!