View Full Version : SECOND WORLD WAR - Home Forces War Book Code Words

Paul Francis
13-07-2011, 19:03
Home Forces War Book Code Words

(Source: WO 199/3289)

Used by

Code Word


GHQ Home Forces G. Ops

Action Stations

Indicated an immediate threat of invasion, for which a full-scale state of readiness,
and calling out of the Home Guard was required

Air Ministry


Code word for a scheme to make operational use in an emergency of a number of training and non-operational aircraft.
The scheme was divided into eight sections, each of which was allocated an individual code-word.

Beetle Network -
Inter-Service Code Word


Plan would come into effect on an invasion, using the radio for issuing certain specific instructions.
See 'Bishop', Blackbird', Caterpillars', 'Finish', 'Gallipoli', 'Parasols', 'Passports' & 'Pepper'

Beetle Network -
Inter-Service Code Word


'I have sighted suspicious vessels which I think are probably enemy, but I am not certain'

Beetle Network -
Inter-Service Code Word


'I have sighted enemy ship/s' (surface vessels, submarines or motor boats’).
First reports of enemy invasion

Orkney & Shetland Defences

Blood Red

‘Enemy troops (a minimum of eight) either airborne or shipborne have landed or are about to land’.
All defences will be fully manned and operational schemes brought into effect.

GHQ Home Forces


A general warning that a raid by seaborne or airborne troops is anticipated, normally followed by the anticipated area,
such as Bugbear Deal, meaning a raid was expected to be delivered at Deal.



Followed by an area and a number, indicating the degree of suitability of weather for invasion by enemy small craft.
1 Suitable, 2 Possible & 3 Unsuitable.

SO-in-C, GHQ


A practice W/T message between regions and the War Office

GHQ Home Forces 'A'


Concentration of personnel reinforcements of certain arms and trades, normally at training

Air Ministry


With addition of either Warm or Cold, refers to suitability or otherwise, of conditions for use of smoke screens.
Warm Suitability. Cold Unsuitability.

Beetle Network -
Inter-Service Code Words


‘Enemy landing from ships or boat at …’

War Office


Only messages directly contributing to the conduct of operations in progress were to be passed to signals for despatch.

War Office/GHQ Home Forces

Nuts & May

Deployment of AFVs from factories

Navy, Army & RAF


Emergency W/T communications between RAF aerodromes and Army Command and Corps HQ,
in the event of enemy attacks on aerodromes

Home Forces War Book Code Words – (continued)

Used by

Code Word


Beetle Network Inter-Service Code Words


‘Enemy parachutists (number indicated) landing at …’

Beetle Network Inter-Service Code Words


'I have sighted a large number of enemy aircraft believed enemy, flying towards shore at …'

Beetle Network Inter-Service Code Words


Used by coastal forces in prevention of invasion, meaning 'I am being attacked';
used in conjunction with Air, Heavy and Light.

Royal Navy


Followed by name of a locality – referred to C-in-C Nore's standing orders for defeating an attempted seaborne invasion.

Air Ministry


Special forecasts of suitability or otherwise of conditions for enemy gas cloud attacks.
such as: ‘Simplex towards Sector No.... Suitable’

Beetle Network Inter-Service Code Words


‘Enemy aircraft landing at …’

GHQ Home Forces

Stand To

Indicated that conditions were particularly favourable for an invasion. Troops would come to a complete state of readiness,
but the Home Guard would not be called out except for special purposes as ordered by GOC-in-C

Royal Navy


Naval beach mines

War Office


Put Nuts of May scheme into operation