Looks good in terms of space!
The only problem is that bunnies can chew through chicken wire mesh like that with one nibble, so you'll likely soon have escapes. Predators also can very easily so it's not secure unless you have another door which is more secure. It'd be best to re-mesh with something more solid - preferably 1 x 1/2 inch maximum (1/2 x 1/2 inch is better), galvanised and 19g minimum.
It doesn't have to be too expensive: http://www.ebay.co.uk/itm/Galvanise...783?pt=LH_DefaultDomain_3&hash=item5d4c719197 should fit.
You also definitely need to mesh inside the door and kickboard below the door too - a predator can rip wood off very easily, even if it's screwed/nailed very securely. It's always best to have an extra layer of protection. If you mesh on the inside where the bunnies are, predators find it harder to get in - it's easier to rip mesh off than push it in enough to break it.
How 'indoors' is the area? Looking at the pictures again it looks bit like a sheltered area outside rather than an enclosed indoor area like an outhouse or a shed. I just wondered whether it may be better to consider winter adjustments now, before you get the rabbits, as English lops don't fare well in winter outdoors as their ability to thermo-regulate is thrown out because of the massive ears. They can even get frostbite on their ears because of this, I imagine due to the normal rabbit response of limiting the blood supply to the ears in the cold.
It would be best to bring them indoors completely, as they fare better as house rabbits. But if you aren't going to bring them indoors in winter, I think they'll need more insulation so the area you have is warmer and doesn't drop below 0 overnight. A heater would be good too, but you will have to be careful that it isn't too warm so there isn't a big temperature drop when they go out in their run, as big temperature changes can trigger 'snuffles' (respiratory infections).
That's lovely!
Are they going to have permanent access to a run? if so, you could run a runaround pipe through the rest of the lean to to the outside run!
So amazing!! You are lucky to be so handy!
I second using welded mesh too. My aviary is made with welded mesh ^_^