By the same token, a Mk.V could have one of at least 3 different types of canopy – the some had the flat sided Mk.I type, others had the bulged type as JDK mentioned, and the third type would be the slightly higher canopy for those Mk.Vs that had the internal armoured windscreen.

The third type can be discounted given your model so far, but I think you would probably be safe with the Mk.I type.