You'll probably find the canopy won't fit over the fuselage spine in the open position Bill. I've used, and will be using again, the Falcon/Squadron vac-formed canopy, and somewhere in my spares box, I have a mould I made for a Hurricane sliding section many years ago, but b*gg*red if I can find it!
If you can't get the vac-form locally, then Hannant's stock them, and there are two in the pack.
I always thought the Hasegawa kit had the option for an open canopy?