Is it legal to export all twitter handles following a certain account (not mine)



Is it legal to collate a list of twitter handles (their twitter handle and name/nickname) and make it available to others on a website - is SQL or Excel format? I want to pick industry influencers and store their followers into a spreadsheet for others to see. To make it clear, they are not my followers and all data collation is performed through the Twitter API following all of their rules. I would not include geographic data or anything not available through the Twitter API. I am in the UK.