Legal Advice: What are the 'options' when it comes to renewables?

Stephen Coppinger advises a landowner who was recently approached by a developer regarding a solar farm being put on their land.

If a renewable energy developer wishes to lease your lands, typically they ask the landowner initially to enter into an 'option to lease' agreement.

Dear Stephen, 

I am a landowner and I was recently approached by a developer regarding a solar farm being put on my land. Some financial terms were discussed with me and they also mentioned that they are interested in me entering into a long-term lease with them over my lands. What would the potential consequences of this be for me legally?