It depends on the amount and frequency, Valerie, but we use Transferwise for smaller transactions.
If it’s either a big one off transaction (to buy a house for example,) or you want to set up a regular monthly payment, we’d recommend Foremost Currency group. They are a broker we’ve used for years, and they get the best rates, but also can do things like pre set up payments to trigger when the rate is at a pre set level. Our account manager is Arron Morris, contact details are here: https://lanzaroteinformation.co.uk/currencies/