Hi

I am looking to buy one bitcoin and struggling to find a reputable place to buy online, 2 of the bigger companies, Coinbase and blockckain Luxembourg have terrible reviews. I am looking to keep the bitcoin for several years. Are there any reputable companies in the UK who can sell the bitcoin to me and I won’t have an issue selling and withdrawing funds in the future should the bitcoin value increase. I’ve heard there are bitcoin ATMs also?

Thanks