Sectornine50: It's nothing. That's not a real photo. It's something somebody drew up in Photoshop. It is a fabrication. Nothing more.
Hyster: You quoted it but I'll repost for sake of emphasis:
"Although 264 Sqn. claimed 48 kills in eight days over Dunkirk, the cost was high with 14 Defiants lost. The actual German losses were no more than 12 to 15 enemy aircraft"
You seem to over-emphasize their effectiveness. That's misleading.
Let me quote something that's probably a bit more reliable than wikipedia:
Previously, a single-seat fighter unit, 264 Sqn spent some time working out the new tactics required by the type. Good co-ordination was required between the pilot and gunner in order to get into the best position to open fire on a target. A second day fighter unit, 141 Sqn, began converting to the Defiant in April 1940. The Defiant undertook it first operational sortie on 12 May 1940, when 264 Sqn flew a patrol over the beaches of Dunkirk. A Junkers Ju 88 was claimed by the squadron. However, the unit suffered its first losses the following day, when five out of six aircraft were shot down by Bf 109s in large dogfight. The Defiant was never designed to dogfight with single-seat fighters and losses soon mounted. By the end of May 1940, it had become very clear that the Defiant was no match for the Bf 109 and the two squadrons were moved to airfields away from the south coast of England. At the same time, interception of unescorted German bombers often proved successful, with several kills being made.
Also please note the following dates:
12 May 1940 First operational sortie, over the beaches of Dunkirk
28 August 1940 Withdrawal from daytime operations
So about 3 months. That was the extent of its daytime lifespan. It's night fighter kills are no testament to its capabilities either, as it was soon replaced by better nightfighters with more performance and firepower.
It was, by all estimations, a failure of design and execution.