These fines indicate that they broke the law by attending "parties" in 10 Downing St and / or Whitehall during Covid lockdowns.
They both then went to the dispatch box in the Commons to deny such events took place and that they did not attend any of them (things that didn't take place). These statements broke the Ministerial Code of Practice.
So, they broke the law and blatantly lied to parliament (us), but never mind they will get away Scott free as the rules are on their side. Sir Lindsay Hoyle has limited powers.
For breaking the law the Recall of MPs Act 2015 can be enacted, but that can only be done by their constituents - so we can forget that happening.
As for the Ministerial Code; it is operated by the government and it is for the prime minister to decide whether any investigation into potential breaches should take place - convenient eh?
All of those given fixed penalties (fines) should be named and shamed, as were shop owners, cinema managers and snowball fight organisers. Those with class, dignity, honour and respect will (might) resign, so that is something we will not get from Johnson or Sunak. Carrie can't resign (except from being the wife of the PM) because she is not part of government and has no input into policy: does she?