Military Engineering, Volume II – Field Engineering, Part II – All Arms, Pamphlet 3 Obstacles 1974

Published by the Ministry of Defence, 1st January 1974. This pamphlet supersedes Field Engineering and Mine Warfare Pamphlet No. 2A.


1. General considerations
2. Barbed wire and anti-personnel obstacles
3. Wiring methods
4. Anti-tank obstacles
5. Road Blocks
6. Urban counter-revolutionary obstacles
7. Obstacles under special conditions

Aim and scope of the pamphlet

This pamphlet deals mainly with obstacles which can be constructed by all arms, without engineer help beyond the supply of engineer stores where required.

Air-Raid Shelters, Leaflet No. 3

This short information booklet was issued in 1939 by the Cement and Concrete Association and consists of 24 high-resolution pages. It summarises the design and construction considerations for splinter-proof shelters for private houses and small buildings.

Raid Spotter’s Note Book

This is a digital scan of the Raid Spotter’s Note Book. This small leatherbound volume consisting of 76 pages was sold privately to be a “concise, accurate and informative compendium of information required by all interested in aircraft recognition and particular those concerned with Raid Spotting.” It contains a breadth of information on Second World War aircraft, both allied and enemy, including sillouhettes of all aircraft and the actions to be taken in the event of an air raid.

War Gases

An early Second World War Air Raid Precautions (ARP) information wheel providing information on the variety of war gases that could have been expected to be released against the British population.

You can download a high-resolution JPG copy of this collage showing all possible selections on the wheel. There are no known copyright restrictions with this image. Free for non-commercial use. Please credit Frontline Ulster when using this image.

RAF Pocklington, HFDF Station Diary

This incredible document was scanned and sent to Frontline Ulster by Mr. G Harris who inherited the diary from his dad who worked at the station and is photographed at the site. Geoff has kindly given me permission to reproduce the diary on this site, and I have made it available for the wider historic community to view.

The diary is contained within a Signal Office Diary, Book 5, and covers the dates between 24/09/1944 to 19/01/1945. Many of the requests come from friendly aircraft seeking to get a fix on their location. The station operated three shifts daily, over a 24 hour period.

For more information on early Second World War aircraft direction finding, you can read my two articles on understanding the HFDF system and locating the sites.

Frontline Ulster Map Project

This is the current map project KML file dated 22 January 2022 containing 1,089 markers covering pre-1900 fortifications through to those used during Operation Banner. The current version is displayed on the interactive page of this site.

This is a long term project and there are still some teething problems, I working through and error checking all the fields in the database as well as updating any images I may have. As such, consider this KML a beta version for development purposes. If you do download and load the file into a GIS package, let me know what you feel I could change or improve on.

You can convert this, or any, KML file into a CSV format for use in Excel by using a free placemark converter here (external link).