Well, we have just had our annual warning that we are potential target of May-Day protests, and are advised:

(a) Postpone any high profile meetings.
(b) Park any executive cars and any other vehicles destined to be parked above ground, below ground if possible.
(c) Ensure that all CCTV apparatus is on line and serviceable.
(d) Ensure that any waste material, skips, dustbins, cigarette bins outside of entrances are removed to minimise their use as missiles or material for missiles and subsequent damage.
(e) Alert all staff to the events of the day and it would be appropriate to limit the time personnel spend outside, etc.

Happy May Day to you all!