Urgh. No.
According to Mr. MOT man, bulkhead is very much structural. Don't start doing **** repairs like filling rust holes with body filler, you will just end up with some piece of crap deathtrap land rover.
You should drill the rivets out of those repair panels and see what is behind them, put some photos up here if you like. Then hopefully you can do a proper repair, get the rust cut out and new metal welded in.
If you weld over those panels it's going to look crap because of how far out your repair panels will be from the existing bulkhead, and you're still going to have a rotten bulkhead.
I'm afraid part and parcel of owning and old land rover is that it's going to need welding doing. You'll sort the bulkhead, and then find you need a patch on the chassis somewhere as well. For your sake I hope the previous owner hasn't been 'repairing' the chassis by riveting metal over holes in it