The kit as Ralph will testify has a good deal of detail and building confusion. I'm adding to this with a swag of extras that I may or may not use, depending on mood and the extra's enhancement of ease of fit.
I've gathered quite a bit of info on the airframes short life and trust that the accuracy is reasonably good.
610 Squadron RAF received 4 Spitfires Mk.Ia which used the code DW-K. The Spitfire P9495 was the second one, which replaced the Spitfire N3289 coded DW-K, which was flown by Flying Officer J K Wilson who was reported lost in air operations over Dunkirk on the 29 May 1940.
Spitfire P9495 was part of the 3rd production order and originally had "white and night" undersufaces, which were repainted in Sky type S, when the aircraft arrived with the squadron, early June 1940.
The aircraft was flown by a number of pilots during its short life, the last being Stanley John Arnfield on the 12 August when P9495 was severely damaged during the mission, and although the pilot managed to perform a safe landing, it was scrapped soon after.
Source: Internet.