Hello, I am Keith, one of the experts on Just Answer, and pleased to be able to help you with your question.
Remember that although your own copy of the P45 may well give employment details, the copy you give to a new employer merely gives information of remuneration, tax deducted to date and current tax code; nothing else. If you have a P45 then the new employer will not initiate the P46 procedure which is only implemented if a new employee has no P45.
I would not worry about the date discrepancy as any explanation needed is perfectly simple. You gave notice and the employer let you go early; happens every day to thousands of leavers.
You are definitely in a Dad's Army 'Don't panic!' situation. Don't worry, just give the new employer his copy of the P45 and it will all go like clockwork. PAYE is very efficient at making you tax neutral at the year end, I should know, my Mother introduced it to the BBC in the early 1940s on its inception.
I do hope that I have been able to set your mind at rest.
There is always a way out of any labyrinth just search the Greek Legends! I can tell you now that getting out of Hampton Court Maze is dead easy! You just tell your new employer exactly what happened and that they let you depart immediately, as I told you it happens every day and there is nothing to worry about. Don't tie yourself in knots trying to make out what isn't exactly true. In any event your new employer will probably pick up your details on PAYE RTI anyway from your UTR or NI Number.
Please be so kind as to rate me before you leave the Just Answer site.
You do not have to show every employment on your CV, particularly if it is basically irrelevant to your normal career pattern. It would merely confuse the reader.
What you told your new employer was quite correct, you had to give a month's notice. You were not to know that you were to be released immediately. If I may suggest, and was is a favourite ploy of my late ex-Father-in-Law, who was a senior executive in the Bank of Scotland, play the 'dart laddie.'
The 'daft laddie' is a Scottish term for being seemingly stupid. The P45 does not tell a new employer anything about previous employments save the pay issued, the tax deducted to date and the tax code to be operated along with the NI Number and maybe the UTR.
I don't think what you did matters a hoot; that you filled your time constructively is to your advantage rather than sitting about on the dole.
Frankly, I think that you are worrying too much over the situation.
What you suggest is perfectly proper and, as I told you originally, there is no need to list every job on your CV.
I think you are handling this very well.
Please don't forget my rating.
Thank you for your support.