1914-25 | 1938-39 | 1940 | 1941 | 1942 | 1943 | 1944 | 1945

KEY:  Rhydymwyn  UK  Europe  World



A small amount of syrup, of American origin, was supplied from Randle.


When the night-time maintenance work was being carried out on the Temporary Effluent Pump, 22 men were affected by toxic vapours masked by the smell of chlor liquor.


The Men’s Mechanical Safety Committee was formed.


The Toxic Accident Committee formed.

1 Jan

R4 was started up.

2 Jan

The worst night of the Cardiff Blitz. That night 165 people were killed and 427 more injured, while nearly 350 homes were destroyed or had to be demolished.

4 Jan

The first load of Runcol was delivered to the tunnels from Randle and the first load of Runcol from R4 plant was also delivered to the tunnels.


Widespread flooding took place on the Valley floor.


All Pyro M tanks at Antelope were frozen to a depth of 7 inches.


The start up of R4 was affected by the adverse weather with 30º of frost recorded.


A rule was made that all liquor lines in the open air must not be disconnected during the hours of darkness. This was not always possible and a lamp was provided for use when breaking lines in the darkness.

19-21 Feb

The Swansea Blitz. The most intense bombing attack in Wales, when a raid that lasted three nights destroyed half the town's centre. 30,000 bombs were dropped; 575 business premises burnt out; 282 houses demolished and 11,084 damaged. About 227 people were killed, 37 of them children, more than 400 others were injured.

7 Mar

The modification of stirrers in R3 and R4 was approved at a cost of £32,190. (G/SPS/12).

29 Mar

Lord Weir and Sir Andrew Duncan (Minister of Supply) visited the site.


The Battle of the Atlantic began.


The MoS instructed that P6 would not be completed as a production unit but the building would be made weatherproof so that it could serve as a store. It was also decided that P4 and P5 would be modified so that the combined output would be equal to the original rated capacity of P4+P5+P6 i.e. 216 tons/week of Pyro M.


A scheme for increasing the capacity of the aqueducts for the river diversion was approved at a cost of £31,950. (V/SPS/16).


An agreement was reached for process men to connect and disconnect vacuum and liquor lines previously done exclusively by maintenance men.


The testing of charging machinery was begun in K5.

6 Apr

Germany invaded Greece.

21 Apr

Miss Margaret Bronfield M.P. visited Valley. She was the first female cabinet minister in the Ramsey McDonald government and was chair of the Women’s Group on Public Welfare 1939-45.


700,000 tons of British shipping was sunk.


Number 3 Fire Station at C2 Pump House was completed.


A full-time Clothing Officer was appointed.


The first female labour started working six shifts per week, with no women working from 7 a.m. on Sunday to 7 a.m. Monday.


The cheese ration was cut to 1 oz per week.


The Petroleum Board recommended that the ethylene furnaces should be converted from burning fuel oil to creosote pitch and the necessary instructions were sent to the contractors.


20 tanks at Woodside were either in use or accepted.


War Weapons Week raised £1,452.

3-8 May

Eight consecutive air raid warnings covered 33 hours 20 minutes.

8 May

A new HP stage C1 fitted in temporary effluent pumps.

26 May

The Runcol plant R3 was handed over to Process.

27 May

The first fully equipped motor ambulance was delivered to the AFC.

27 May

A new LP stage C1 was fitted to the temporary effluent pump.


All Antelope Pyro M tanks had now dried out.


No. 1 Fire Station at North end of site was completed.


All tanks in the D Chamber of the tunnel had been filled.

1 Jun

Clothes rationing was introduced.

19 Jun

Both temporary effluent pumps were changed because of problems with slip ring brushes.

22 Jun

Germany invaded Russia.


I.C.I. manufactured 3 Kg of Uranium Hexafluoride (Gowing).


The No 4 Fire Station was opened on S.E. Assembly site.


Nurses had replaced the men first-aiders in the Ambulance Room.


Production of 25 lb shells, 30 lb Mark I and Mark IM bombs began.


The MoS approved modifications to the S20 distillation units in P4 and P5 on the recommendation of CDRE Sutton Oak and MSF Randle.


The charging building K5 was handed over to Process and in the same month the instruction was received that the Pyro should be further modified to allow the use of benzene instead of MCB as the Pyro Dilutant.


Ernest Bevin called up 30,000 men to work in the mines.

14 Jul

New check plates were fitted to both temporary effluent pumps.

22 Jul

The emptying of the tanks from the Antelope Field into the tunnel storage was commenced.

25 Jul

Both temporary effluent pumps were changed because of problems with slip ring brushes.


The No. 2 Fire Station was opened in the middle of West Triangle Rd.


The “Y” Committee was formed.


A pH meter was installed on the temporary effluent pump.


The production of 6” Howitzer Shells began.


The modifications to the river culvert were completed after the winter floods.


Women were put on toxic work.


The R7 tanker from Randle was loaned to Valley.

5 Oct

Both the temporary effluent pumps C1 stages were replaced.

5 Oct

The transfer of the material from Antelope Field to the tunnels was completed.


The main effluent pit was commissioned and the temporary effluent pump discontinued.


P5 was handed over to Process but was put on standby.

6 Dec

The Japanese bombed Pearl Harbour, Hawaii.

7 Dec

Britain and the USA declared war on Japan.

9 Dec

Conscription for single women between the ages of 20 and 30, liable for military service or other work was started. The call up age for men was lowered to 18.

10 Dec

Repulse and Renown were sunk.

11 Dec

The USA declared war on Germany and Italy.

20 Dec

The first heater was installed in a Woodside tank to prevent a repeat of the freezing of the tanks in the previous winter.

24 Dec

A second ambulance was delivered.


The Rhydymwyn Valley History Society is funded by:

Heritage Lottery Fund Subterranea Britannica Flintshire County Council Welsh Government
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