I have a few IAC kits which I've built as per my limited research and information I had at the time.
Are they accurate? No. Colours and boss and numbers are all over the place and wrongly done as I've found out latter, when I have gathered more information and found some new photographs unknown to me at the time of the build.
Am I lying wake at night and getting grey because of it? No.
I'm always saying it depends what do you expect from the kit.
Airfix does a great job in making affordable and relatively easy to assemble kits for the beginners. If beginner buys this kit and builds it and paints it according to the instructions that's OK.
If you want to build 'an Irish Hurricane' then work away. If you want to build a replica of the 105 then you would have to do a bit more research. That was my point.
A bit OT, there was uproar when one of the Chinese manufacturers /don't know which one now/ kept releasing kits of the Czech AF with the national insignia the wrong way. They were informed about their mistake a quite a few times by various people, but no, they kept at it. Until recently... But hey, doesn't matter as long as it's 'the CAF' machine