Working remotely in the UK for a US employer

Not sure what to use for the subject so bear with.  I am a British Citizen living and working in the US. My job is 100% remote and could be done from anywhere in the World. I was curious about whether I could move to the UK temporarily, perhaps two or three months, continue to do my work from a home office there rather than in the US, without falling foul of any UK laws.  Is there a maximum about of time I could be in the UK while working like this. I'm looking to avoid paying any UK tax or other employment requirements.  I would obviously have to get my current US employers sign off on doing this. 

I guess this would apply - https://www.gov.uk/tax-foreign-income/residence

UK tests

You may be resident under the automatic UK tests if:

you spent 183 or more days in the UK in the tax year

your only home was in the UK for 91 days or more in a row - and you visited or stayed in it for at least 30 days of the tax year

you worked full-time in the UK for any period of 365 days and at least one day of that period was in the tax year you’re checking

You may also be resident under the sufficient ties test if you spent a number of days in the UK and you have additional ties to the UK, like work or family.

If I am reading this correctly, I could do what I outlined in the first paragraph so long as I did not spend 183 days or more in the UK.

Thanks.