For the best advice see a tax pro familiar with US-UK taxation
here's a link to the tax treaty and technical explanation.
https://home.treasury.gov/system/files/131/Treaty-UK-7-24-2001.pdf https://home.treasury.gov/system/files/131/Treaty-UK-Protocol-TE-7-22-2002.pdf
you may want to read Article 24 starting on page 95 in the technical explanation.
I'm not an expert in US-UK taxation but it would seem the income would be reported on your US tax return and you would claim a foreign tax credit.
