It started out as Emily Thornberry’s evisceration (metaphorically speaking) of Liz Truss over the Japan trade deal but was deflected, by you, to laughing at politicians in general; a diversion gleefully jumped on by brexiteers rather than counter Thornberry’s facts and figures
Just for the record, Liz Truss had opened the debate but didn't reply to Thornberry. She left her junior, the Minister for Trade Policy, Greg Hands to wind up. Basically, Labour MPs took the piss (an important deal, but hardly "groundbreaking" as it mostly just copied the EU-Japan deal), pulling to shreds all the flowery claims about British exports (especially geographic marks like Stilton).
E.g. "The Secretary of State has also claimed that another 70 of our food and drink products will be recognised by Japan under the geographical indication scheme, increasing their value and protecting their brand. I say this gently, but it does appear that the Secretary of State is exaggerating just a little. There are only seven, not 70, GIs recognised in the UK-Japan deal—exactly the same as in the EU-Japan deal."
"The tariff reductions agreed in the UK-Japan trade deal are almost identical to those set out in the EU-Japan deal. Important analysis by the independent UK Trade Policy Observatory found that there are just 11 out of 9,444 products where the tariffs on UK exports are set to be lower under the UK-Japan deal. As my right hon. Friend the Member for Islington South and Finsbury (Emily Thornberry), the shadow Secretary of State, pointed out, the extra concessions to the UK are striking by the lack of logic behind why Ministers sought them, as, for example, we have had no exports to Japan of any of these products, which include dried eggs and ostrich leather."
Now, unicorn leather, we specialise in that.
(Do we have to pay copyright for the EU texts that we've plagiarised? Well, no, be fair, we did pay contributions to the EU so I guess some of that bus money went to negotiating the trade deals we are now trying to replicate.)
Thornberry did also point out that lots of our current trade deals expire in 5 weeks. She picked out Algeria, Bosnia and Herzegovina and Serbia, trade worth £3.5 billion last year while ("to put that into perspective for those on the Government Back Benches"), the growth in UK exports achieved by the deal with Japan is forecast to be £2.6 billion in 15 years’ time. Altogether it's £55bn of trade that is currently covered by EU deals that will not be covered by any deal on 1st January.
NB to Brexiteers. The only aim of this post is to entertain sensible people who never thought Brexit a good idea, not to persuade anyone else how bad it is.