Self Assessment Question 8 Do you need to pay tax on any of the following?

The question ask if I pay any tax on income from outside the UK. Does it mean pay any tax in the UK? or pay any tax outside the UK?

Hi,
When an Article states the income ‘may be’ taxable it means both countries have a right to tax the income.  
In these circumstances, the customer makes a claim for Foreign Tax Credit Relief.
Thank you.