Whilst I appreciate that some people's theories seem rather fanciful and possibly stupid (such as the ECML being perfect south of Darlington), and people have every right to disprove them respectfully, it doesn't help by making snide, uppity remarks aiming to morally one-up yourself over your target by invoking fallacious reasoning* like, "oh, you have to work in infrastructure design and timetable planning in order to have an opinion that differs to my own", is crap logic and unhelpful to explaining why they are wrong.
*Another example of this would be someone going into a restaurant, eating disgusting food and getting food poisoning. If this person then goes to the restaurant to complain and the chef/owner's response is to tell them that they should open their own restaurant and cook their own food before critiquing their's.
*Similarly, I do not need to form my own United Kingdom, my own British Parliament, my own European Union, host my own EU Referendum and host my own Brexit process in order to criticise the current government's approach to it.
But, I digress.