Meanwhile, the rest of 58th S/L Regt (425 and 426 Btys) had remained with AA Command. In May 1944 it was joined by 314 (Kent) S/L Bty from &lt;a href="29th%20%28Kent%29%20Searchlight%20Regiment%2C%20Royal%20Artillery"&gt;29th (Kent) S/L Rgt&lt;/a&gt;. Then on 1 June E Troop of 372 S/L Bty of &lt;a href="43rd%20%285th%20Duke%20of%20Wellington%27s%20Regiment%29%20Searchlight%20Regiment%2C%20Royal%20Artillery"&gt;43rd (5th Duke of Wellington's Regiment) S/L Rgt&lt;/a&gt; joined and became E Trp of 425 S/L Bty. Soon after D Day in June 1944 the bombardment of London by German V-1 flying bombs began, and AA Command was engaged in the efforts to combat them (Operation Diver). Much of AA Command's strength was repositioned on the South Coast of England to engage the V-1s as they came in over the sea. In the centre of the line at Dungeness were four Z Batteries, each of 64 twin 3-inch rocket-launchers. Z Batteries defending towns were by 1944 largely manned by shifts of part-time members of the Home Guard, but for these frontline batteries the detachments were provided by 58th S/L Regiment, which had been hastily trained in the new role.