Is it fair?

I missed out that Soubry used Broxtowe to get a seat at the time when the nation was turning against the long Labour rule and Broxtowe was considered to be reasonably marginal so she made a strategic move, sucking up to the local Conservatives who have continued to support her very strongly. It has remained a fairly marginal seat so without these loyal Conservatives she could well have lost her job. There are people who work long hours at the office for nothing. She did not consult them or explain but just walked out on them after all they had done for her. She owes her Parliamentary career to them. To decide suddenly (she'll say it wasn't sudden, probably) to turn away from these people whom she definitely used in order to get her seat in Parliament, just sickens me. I am not a Tory voter, but I do respect a lot of the people who have worked for our constituency on both sides.

Urmstongran. If you would like to privately message me I can give you an honest and true account of her visit to me after a builder left my house badly damaged and also took money falsely. It is almost funny except that at the time I could not believe it had happened! However, it happened to many others so I knew it was real! I did contact some colleagues and Senior Psychiatrists I worked with at the Institute of Psychiatry for advice! Interesting....

Shinyredcar
An MP is voted for as an individual person. Yes of course. A person who has made promises. Then breaks them.
But Anna Soubry used the local Conservative Party. She played it strategically by jumping in when the Labour Party were obviously losing favour with the country and so she picked a marginal seat to fight - Broxtowe, where the local Conservative Party and Office went all out to work very hard for her. Had she stood as an Independent then or since I am sure she would not have been backed by them and subsequently not have achieved the votes to get her elected. Remember, they back her with a lot of time given freely and a lot of money which they raise themselves by fundraising and from their own donations. She was supported by these people's money to run her election campaign. It was money they earned. She was happy to let them spend their time and money on her so she could get into Parliament. She owes them loyalty. As it is the seat has remained somewhat marginal. She won it the first time after several recounts. With a bit of luck maybe we can get rid of her now.

I wonder how many people have voted Conservative without realising that their Tory candidate was, or would become, a member of the "party within a party" which is the ERG.

If you want to check your MP, here is a list.

www.bbc.co.uk/news/uk-politics-42719026

An MP is voted for as an individual person
That's not necessarily the case Shinyredcar

In a GE most voters will vote for the party despite the candidate; however, when one lets them down and fails to represent the views of the majority of their constituents, then they may well get ousted at the next election.

What Jalima says.

Quite a few including Soubry have really only left their Party because they don’t agree with us leaving the EU.
They should all face a by-election really, but if there is a GE
This year, that will be a test as to whether their voters really want them or not.

Jalima1108 Yes, at the next election they will have to stand as an independent candidate and reach the criteria for standing, standing against the new candidate for the Tories. Obviously the Conservatives in Broxtowe now have to find another candidate which I believe they are already doing. We have a very popular and sound Labour candidate in Greg Marshall however, and it is quite likely voters will see his dependable and trustworthy character and wisdom with more clarity after this shock and vote without a party allegiance being a priority.

She may have very decided views and has no hesitation in airing them constantly - and presumably, as you say, she may not have time left over for her constituents or even listen to their views.
The MP who treats their constituents with disdain is on shaky ground - especially one who has just left their party.

MPs are not delegates who just act as mouthpieces for their constituents, they are elected to use their own judgement as to what is in the best interests of their constituents, as Anna Soubry has done by speaking out against the threat of brexit.

Having said that, I think in normal circumstances, it would probably be right for Anna, and her colleagues who have resigned from their parties, to resign and fight by-elections. However we do not live in normal times. This is, without a doubt, a time of national crisis, unprecedented in most of our lifetimes.

The last thing we need right now is the diversion of a string of by-elections. Time is running out for us to address the pressing need to - firstly, stop a "no-deal" brexit, and secondly, to stop any kind of brexit altogether because any kind of brexit will irrevocably damage our country and blight the futures of our children and grand-children.

No-one said that MPs should be just mouthpieces for their constituents.

However, if the MP is neglecting constituency duties because they appear to their constituents to be interested in only one thing - with which the majority of their constituents disagree - and are not interested in any other problems which their constituents have, then they will be on shaky ground at the next election.

The OP asks "is it fair?" There is very little fairness in British politics.

The Electoral Commission has released its latest figures for political donations. In the last three months of 2018 £10.4m was given to political parties - £1.9m more than in the previous quarter. Most of it, £7.4m went to the Conservatives, who received more than four time as much in donations as Labour (£1.6m). The increase is almost certainly linked to speculation about a possible early election.

www.electoralcommission.org.uk/find-information-by-subject/political-parties-campaigning-and-donations/donations-and-loans-to-political-parties/quarterly-donations-and-loans