For a start, if everyone who held public office could be taken to court for peddling a mis-truth, or saying anything about anything that turned out to be less than 100% correct, then there would be very few people in public office who would not be vulnerable to prosecution. And even fewer willing to occupy such posts.
Secondly, for the crucial part of the time period in the charge, running up to the referendum on 23 June 2016, Johnson wasn't in public office as such, unless you count being a backbench MP. He ceased being Mayor of London on 5 May 2016. (The charge cites the dates as 21 Feb - 23 June 2016 in the run up to the referendum and 18 April - 3 May 2017, in the run up to the General Election, when Johnson was Foreign Secretary). In 2016 Johnson made some daft comments about Turks and Turkey and I expect this was while he was still London Mayor but the statements weren't related his job. In the weeks before the referendum Johnson was speaking in support of a political campaign, not in any capacity as a public servant, because he wasn't one. And arguably it was also the case in the General Election campaign that he was speaking as a political campaigner.
But more fundamentally, where is the lie?
Let's just remind ourselves what was on the Brexit bus:
"We send the EU £350 million a week". This statement is an exaggeration. After Mrs T's rebate is applied (which comes off before we send any money) we send something like £250M to £280M a week to the bloated blob of Brussels*. (Don't tell me it isn't a bloated blob because I went to the Berlaymont on a monthly basis for while in the 1990s and it will only have got more so). Stats nerds can't even agree on the precise number, which anyway is only known precisely after the event. And the figure is back-calculated once the figures for the year are known. It will have escalated as it is linked to GDP, which has increased more than the projections, so it could be north of £300M by now. So, an exaggeration, but Boris is a damned sight better with numbers than Diane Abbott!
And Boris no doubt didn't personally research the £350M number, it will have been plucked out of the air by the Vote Leave campaign. (The TV docu-drama showed Dominic Cummings shouting at people until they came up with a rationale for a number he liked. Everyone involved in communicating with or persuading people in politics, business and many other fields of endeavour has done this many times......I certainly have!)
OK, so we then get money back for regional projects and the net figure is lower. But we don't have the choice of how to spend that, so the logic that we could take back control and choose to spend it on the health service is 100% correct.
The lie as such comes a step further on when folk like the Welsh farmers, who benefit from this recycling of our cash via the EU, were told they would still get the money, effectively double counting the saving, or spending it twice. How often have politicians tried to have their cake and eat it in this way?
None of this is new - I argued all of these numbers through in my blog posted 3 weeks before the referendum (Lies, damn lies and statistics in the referendum campaign" 2 June 2016). And I'm pretty sure I've said that, while many politicians dissemble, Boris tells lies, my logic being this last point about double-counting. But he was called out for this at the time and I don't know many people who didn't take the £350M number with a pinch of salt - it was the principle that got leave voters exercised.
However, the point that worries me is that, if we ever fall under the cosh of the Marxist Party of Islington we may become very reliant on the law to protect personal property and personal liberties. It will have to be impassionate, apolitical, logical and rigorous.
I can only think this charge was allowed through by District Judge Margot Coleman either because of her political view on Brexit or a party loyalty or because it has commanded a degree of public support via donations, a bit like a reality TV vote. I can't see any good reason in law or logic for her statement that:
"I accept that the public offices held by Mr Johnson provide status, but with that status comes influence and authority.
"I am satisfied there is sufficient to establish prima facie evidence of an issue to be determined at trial of this aspect."
If this charge is allowed to proceed politicians' answers to questions are going to get even more convoluted, as they would be forced to always quote others for their tenuous "facts". Meanwhile anyone not in a "public office", even if standing for one, would have a different standard applied to them. That would not be logical, fair or workable.
Judge Coleman has taken a first step in a dangerous direction and should have thrown this worthless case out.
* sources on 2016 data: Full Fact says "closer to £250M" (https://fullfact.org/europe/our-eu-membership-fee-55-million/) and another website says "around £280M" (https://esharp.eu/debates/the-uk-and-europe/how-much-does-britain-really-pay-into-the-eu-budget) so even the statistical nerds can't agree with any precision