Although they unit saw no active service, they supplied trained gunners to siege batteries engaged on the Western Front during World War I.

[13] By October 1914, the campaign on the Western Front was bogging down into Trench warfare and there was an urgent need for batteries of Siege artillery to be sent to France.

In April 1918 the Clyde Garrison comprised the following administrative batteries under the control of No 23 Fire Command:[17][18] These defences never saw action during the war.

110th Siege Battery was formed at Sheerness under Army Council Instruction 397 of 21 February 1916 from a cadre of three officers and 93 other ranks supplied by the Clyde RGA (almost certainly 1/1st Company),[19][20] together with men drawn from the Thames and Medway Defences.

By the end of July the old mortars were worn out, and the battery spent August without guns, providing fatigue parties before it was armed with four modern 6-inch howitzers.

[21][22] By now massive quantities of artillery were employed for each phase of the continuing offensive as Fourth Army attacked again and again:[23][24] Fourth Army's front remained relatively quiet during early 1917, then in the Spring it was involved in following the German retreat to the Hindenburg Line (Operation Alberich), which entailed much work for the siege gunners in moving their guns over the devastated Somme battlefields to get back into range of the enemy.

[20][21][22][25] In November the battery was assigned to 21st Heavy Artillery Group (HAG) with Third Army,[22][25] which was preparing for its surprise attack with tanks at the Battle of Cambrai.

[26][27] When the battle began with a crash of artillery at 06.20 on 20 November the German defenders were stunned, and the massed tanks completed their overcome.

[28][29] On 30 November the Germans put in a heavy counter-attack against the weakened and ill-organised troops in the captured positions, which they quickly overran.

Artillery Observation Posts (OPs) were blinded by early morning mist and many were overrun along with the infantry in the forward zone.

[25][34] In late July Fourth Army began secretly massing its artillery for the Battle of Amiens, which launched the Allied Hundred Days Offensive on 8 August.

There was no preliminary bombardment: instead the 6-inch howitzers formed the front part of the Creeping barrage but distributed unevenly to deal with specific sunken roads, fortified farms, strongpoints, etc.

When the TF was reconstituted on 7 February 1920 the unit was reformed with one battery from No 1 Company and one from Nos 2 and 3, under the command of Brevet Lieutenant-Colonel James Lithgow.

As the threat from German attack diminished there was demand for trained gunners for the fighting fronts and the War Office began reorganising surplus coastal manpower for duties elsewhere.

[63] By April 1944 many of the coast battery positions were manned by Home Guard detachments or in the hands of care and maintenance parties.

[64] In June 1945, after VE Day, 407 Bty was disbanded, 153 and 154 passed into suspended animation, and 152 and 308 Btys joined 505th (Forth) Coast Rgt.