Pillbox Study Group

Committed To The Study & Preservation Of 20th Century United Kingdom & International Pillboxes & Anti-Invasion Defences

The Pillbox Study Group (PSG) is for those who believe that ‘History’ did not end with the dawning of the 20th Century and that defences and fortifications built of ‘Concrete’ are as important as those built in the time of the Romans or the Normans.

The humble, if ubiquitous, Pillbox is often the first example of a defensive work seen by many people. Which is not surprising as over 18,000 were constructed across the British Isles to resist the Nazi invader during Hitler’s proposed ‘Operation Sealion’, the planned German Invasion of England set for 1940.

It is the aim of this website to introduce to you some of the more common Anti-Invasion structures that you are still likely to find surviving around the world, and in particular our own countryside and to give you an idea of the reasoning behind their particular locations.

We are particularly interested in recruiting new members and relish the chance to explore any new sites that you can tell us about. As part of your membership you will receive our journal ‘Loopholes’ and can take part in our organised Pillbox Rescue Archaeology Projects and War Walks.


Moray Firth Type 24 Fly Round

Join The Group

We welcome new members to the PSG. We currently have over 300 members in six countries . Members receive the journal 'Loopholes' three times a year which details recent finds and sites of particular interest.
PSG Membership
For more details about PSG, membership, Pillboxes or Defence Structure related topics contact our Co-ordinator Roger Thomas.


Defence Structures and sites of all types both above and below ground can be very dangerous. Serious injury or even death can arise from unauthorised entry into such sites and structures. Join a responsible club, group or society who can arrange official visits. The Pillbox Study Group accepts no responsibility for any damages or injuries caused by ignoring this advice.

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