Hostile reconnaissance is:

Pre-attack surveillance — photos, timing, testing access

Martyn's Law primarily applies to:

Premises and events that meet certain capacity thresholds

Which is a behavioural sign of hostile recon — not profiling?

Someone repeatedly photographing security infrastructure across multiple visits

If you find an unattended bag at a transport hub, your first action is:

Apply HOT and, if suspicious, clear the area and report

All pillars

Terrorism Awareness pillar

Terrorism Awareness

Counter-terrorism awareness for the front line — hostile reconnaissance, Run-Hide-Tell, Martyn's Law, ACT reporting, and behavioural (not appearance-based) indicators.

13 free lessons in this pillar.

All Terrorism Awareness lessons

UK threat picture — overview
15 min · Day 66
What Martyn's Law (PSTPRA) means for you
10 min · Day 67
ACT Awareness — quick refresher (signposted)
10 min · Day 68
Hostile reconnaissance — what to look for
15 min · Day 69
Suspicious behaviour vs profiling
10 min · Day 70
Vehicle as a weapon — early warning
10 min · Day 71
Marauding attacks — Run, Hide, Tell
15 min · Day 72
Edged weapon awareness
10 min · Day 73
Insider threat awareness
10 min · Day 74
Reporting via ACT and 999
15 min · Day 75
Spot the hostile recon behaviour
10 min · Day 5
Run, Hide, Tell — quick recall
10 min · Day 14
Suspicious package — what HOT really means
10 min · Day 23