Thanks guys - I'd meant to reply earlier, but I find it difficult with the ipad.
Here's a pic of the earth lead I mentioned, on a RHD car.
I'd have been happy enough to leave it, but it's a P38, and it's electrical... but in fact when I was "in the neighbourhood", I noticed that the engine lifting eye hadn't been tightened down, so I just stuck it on to one of those bolts.
On the oil separator it was in fact only in the RH cover. I'd assumed it was just missing from the LH. I stuck in what was left of the broken one - about 3/4 of it, so I'm sure it's better than nothing.
ac6 - I could have posted a lot more mumps and groans.... I didn't enjoy my manifold heat shields either! I did spend a couple of hours though grinding off all the old captive nuts; replacing them with 'rivnuts'; sticking the anti-rattle wire pads back on; and stainless bolts on the rebuild - looks more or less good as new. Also I'm sure I will be overjoyed when (if!) it starts again, but there will be a healthy amount of finger crossing, hoping for the best, and touching wood in the last few moments before turning the key!
Car is now more or less back together; filled with oil; could only get ca. 6L of coolant in but that might be enough as the block wasn't drained? But I'm going to wait till the weekend rather than trying to do this when I've already done a day's work.
Already looking to the next thing - finally getting the windscreen rebonded. I'd like to get this done properly but if the windscreen guys are going to use wire saws to remove it, surely they're going to trash the sealer strip between the dash and the glass on the inside? Item 35 in the diagram below.
It's not showing up as a part number, so maybe no longer available? Does anyone know for sure if that's the case? Is it just some foam that could be replaced with generic stuff?
Will update on the engine starting at the weekend!