Mark,
Thanks for the reply.
Ahhh - it's always wise to be wary of official histories AND War Diaries. Like any other form of record, errors and omissions creep into them from time to time. You're quite right, the CB Fireflies aren't mentioned in the regimental history by Miller.
The two tanks were commanded by Lt Knowles and Sgt Ellis.
Various unpublished memoirs and sources identify the vehicles in question - including an online memoir from an RNVR Sub-Lieutenant from LCT (CB) 2337.
http://www.eurosurf.com/John_Brooke/
Maj Wormald (O/C A Sqn) refers specifically to Sgt Ellis in his own unpublished notes and confirms that Ellis' Firefly was one of the six tanks left in A Sqn after D-Day.
"The five remaining tanks (S/Ldr, Capt. Lyon, Lt Hunter, Sgts Hepper and Morris) went into Hermanville and took up posns. on the south edge of the village. They were joined by Sgt. Ellis with his Sherman V(c). He was particularly welcome with his powerful armament."
(the 13/18 War Diary records A Sqn strength at 2000 on 6th June as six tanks)
Similarly, the Loading Tables for Sword Beach record a single LCT (CB) due to land at H-Hour.
The CB Fireflies are also recorded in WO171/102 at the Public Record Office:
"Six Sherman 17 pdr are being issued to 1 Corps on a priority, to be used in LCTs for concrete busting. These vehicles are to be manned by First Reinforcements of 27th Armoured Brigade and 2nd Canadian Armoured Brigade. They will held on charge by 259 Delivery Squadron (1 Corps)"
(from Mark Hayward's "Sherman Firefly" - page 23)
So - strictly speaking none of the six Fireflies were "on charge" with the regiments in question and don't necessarily show up on their records. However, they were still crewed by regimental personnel and operated as part of the regiment for an unspecified period of time during and after D-Day.
Thus, although the official history doesn't mention them, other sources do and there's sufficient cross-referencing possible to satisfy me that both vehicles existed and that they didn't belong to C Sqn.
Which leaves an interesting question - were CB Fireflies used on Gold Beach (I presume so...)?
Cheers,
John