The establishment strategy to stop Brexit has not changed since 24 June 2016 and has been dictated by the EU.
First get a remainer PM anointed and thus ensure a remainer dominated UK cabinet. Mobilise the pro EU majority in the media, academe, big business, HoC& HoL to dominate TV radio, twitter etc
The delay, obfuscate and waste time until there is no negotiating time left and we have to take what the EU dishes out, ie nothing, whilst the EU useful idiots drone on about the disaster that will befall us if we leave on WTO terms which the remoaners call a cliff edge that 92% of world trade uses. That is the big lie. Under WTO rules we win, the EU loses.