Coinbase was founded in 2012, and is the biggest and most reliable bitcoin buying and selling service internationally.
On Coinbase you can buy bitcoin, Etherium and Litecoin for GBP, Euros or USD, using your bank account or debit/credit card.
At BTCtoGBP.co.uk we have used Coinbase numerous times and can vouch for the quality of the service provided.
We can confidently say that Coinbase is not a scam. Like any website there is always a small risk, but Coinbase is probably the most secure bitcoin site in the world.