Why do we think "efficiency" comes into her thinking?

Anyhow, I suspect the real issue we face might be whatever EU database sits behind mutual recognition of passports to allow for use of the automatic scanners.

As a frequent traveller to the EU27 we're already often in the 'non-shengen but EU' queue, I'm really hating the thought of going to the complete third party queue fest.

I've never seen that - where have you seen that?

Loads of places. You fly in from the UK and you're arriving from outside the Schengen area so there is a passport control. At the moment at least in passport control we (as in UK) can use the EEA queue but I suspect we will be in the "others" queue soon.

Hmm re-reading my original post I can see I could have been clearer with what I meant.

The last 2 times I entered the UK - the last about 2 weeks ago - at LHR T5 - using a British passport - there was hardly any waiting at the automated gates and I was through within a couple of minutes.

Of course the non-EU line was huge.

The main topic on the news while I was there seems to be about a no deal Brexit and worst case scenarios. It will be interesting to see what happens but I get the impression a lot of things are unclear at this point including border controls.

What's the problem with having "UK Citizens" line? It's pretty common to have one set of lanes for citizens and other sets for non-citizens. I guess it would be "UK/Ireland citizens line".

If you're not British or Irish, then after Brexit everyone else should end up in the "others" lines. Seeing as the UK has always been separate from the rest of the EU on travel, refusing to join Schengen and whatnot, it would be strange if the UK kept preferential travel for EU citizens.

Does anyone know of post-brexit UK citizens will have the right of abode in Eire and vice versa?

Unless Ireland and the UK change their laws, yes.

If that remains true, the Irish Passport would be the "Super Passport" of Europe - entitling the bearer to reside in the EU or the UK.