No the worst deal would be no deal where we abide by WTO rules.
I've changed my mind on this over the last few months as I've read more and more. Ensuring the City has tariff free access to the EU markets should be priority number 1. No matter what that costs, we have to safeguard this.
People are talking about game theory and nationalist pride about "getting one over on the EU", but this is irrelevant. If we lose the City we're immensely fucked as a major trading nation. Walking away with no deal would be an almost treasonous act that will sink our economy 100 times more than nationalizing some industries
As someone very supportive of Brexit, I can only agree with all you say about the importance of the City.
It is a question of we are where we are.
One approach to protect and further enhance the role of the City would have been for the nation to vote Remain
Given that the nation voted Leave then there is the choice of either a) ignoring/betraying that vote and manufacturing a way of remaining, or b) staying true to the referendum outcome and securing the best outcome that can be achieved from the position we are at.
The undermining of the referendum outcome has been a focus for many at Westminster since last June. Some parties/camps have been more obvious and some others have tried to be more subtle in their methods - e.g. the A50 wrecking amendment. I would be adamant that the Labour position of - we will not leave without a deal is an open door/goal for the EU. So if Labour were to win then we will effectively not leave the EU - we will have (can) secure the City's position - but at the cost of all that Leave voters voted for.
So it actually, IMO, boils down to either taking action that essentially undermines the referendum outcome - essentially setting it aside - or seek to establish a negotiating position of 'some strength' and negotiate a departure that includes securing (sufficiently) the role of the City.
Only the Conservative party's (stated) approach can achieve that and it can only be successful if it is progressed in the near/medium term. There is opportunity/risk based on the current operation of the City and the manner in which it is so integral to so much that the EU is dependent on - let's not allow a few years of paralysis to enable the EU the space to mitigate the exposure they would face by playing hard-ball.
I am a committed Leave supporter, but as I say I recognise the truth of what you say re the importance of the City.
My preference would be that we all as a nation (as much as possible) get over it and get on with it - rear-guard skirmishing is not going to help a successful outcome. That is why I fully supported the decision to go for an election. The Brexit negotiating team (not just the figureheads like May) need to have a position to professionally manage the negotiations without debilitating sniping from those that simply cannot get over it.
If that cannot be achieved I would have rather we had voted Remain.
People talk about us 'shooting ourselves' my deciding Brexit - I can understand that but that was the outcome. There is so much bollocks spoken by the likes of Farron about "...we must respect the referendum vote...." - what dissembling!! What he means is that he wants what he sees as 'that stupid fucking decision' reversed - but he cannot come out and say that.
There is also a degree of compromise for tactical reasons in the Labour stance. All this 'we will not leave without a deal' seems to me to be a stance to prevent leaking votes to the LDs - taken at the time shortly after the announcement of an election and thoughts that Labour could leak votes to the LDs as well as Conservatives. It is not at all thought through and that was clear when Corbyn was challenged to provide some substance. People are still just 'skirmishing' and will continue to do so unless there is a sufficient Conservative majority to override those actions.
The associated problem though is that the Genie (A50 notice) is out of the bottle. A bad deal which will be (IMO) the inevitable result from the Labour stance can only lead to a fully UK compromised deal or a withdrawal of the A50 - both entirely on the EU's terms. So loss of vetoes - loss of rebate - our required commitment to further integration etc.
Yes, we will secure the future of the City within such a deal - but many will see it as a betrayal of what they voted for.