Q.Growing a laurel hedge
I have recently planted a laurel hedge. Most of it has grown really well but a section that is right behind a row of pine trees is struggling. I realize that it is very dry, as the laurel is shaded by the pine trees, and I have made sure that it is regularly watered but it is still not doing well. Someone has suggested that I should try adding some garden lime, as the soli will be acidic from the pine trees. Can anyone offer any advice?

I would start with a soil test. This is the only way to determine what the soil may need or what to amend the soil with for plant success.
Here are some links for you.
https://www.gardeningknowhow.com/ornamental/shrubs/cherry-laurel/growing-cherry-laurels.htm
https://www.gardeningknowhow.com/extension-search/
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm