Thanks for your response
If you come to live in the UK, then under the arrangement that you advsie on, you will be treated intially as a UK resident by your presence here, and with family and work.
However if this work (or downtime) sees you spending less than 91 days a year (tax year which runs from 6th April to the following 5th April) in the UK then you are able to be treated as not resident for UK tax putposes, which means that the UK will not be resposnible for your tax position (and in fact the country where you spend most of your time will be)
But as a guide for the UK tax regime, as your income will be in excess of £120,000 there will be the loss of UK tax free personal allwoances, (as for every £2 over £100,000 earned - sees a loss of £1 of personal tax allowances. As this currently see the first £10,000 of income permited to be tax free - your loss the entitlement at earnings of £120.000)
So no personal allowances
The first £31865 at 20%
Then from £31866 to £149,000 40%
Anything over £150,000 at 45%
So on £225,000 plus £50,000 bonus - your annual income will be £275,000
First £31865 x 20% = £6373
Next £118,135 x 40% = £47254
Final £125,000 at 45% = £56250
So total tax due £109877
Net Income 165123 per year
(as you will be paid from outside of the Uk there will be no UK National Insurance, but you may like to set up a voluntary arrangement - I have added a link here for you regarding this)
It does not list living in the UK but working abroad - but you would be considered eligable to make this contributions if you wish.
No other taxes you need to be aware of if you merely have a salary coming into the UK (if you choose to set up and live here)
The main way to reduce tax exposure to the 40% and 45% rate bands is to consider making arrangements to contribute to a pension scheme - if thee payments are made with your salary after taxation, then you can contribute up to an annual amount of £40,000 a year (or 100% of your salary whichever is the lesser) and, as you only get basic rate tax releif added into the pension plan, you then create a position of tax refund - due to your entitlment to tax releif at your highest rate.
So a pension contribution of £40,000 sees actually £48000 going into the pension pot (with the 20% tax releif) but also a tax refund due to you of £10,000 (£40,000 x 25% - which is 45% your highest rate of tax less the 20% tax releif given at source by the pension plan)
This then puts this additional £10,000 into your pocket thereby redusing the tax burden.
Your travel amy be tax deductible as wholly and exclusively in the performance of your duties, bt normally you would find that an employer covers these costs directly - or pays you compensation through an expenses claim - which would render the costs tax free again under the wholly and exclusive rule.
Let me know if you have any follow up questions, but this is the main overview to the UK tax regime andhow it would affect your cicustances