Thanks everyone, I’ve always just ordered a separate phone, and separate pin from giffgaff and used my debit card to buy the cheapest monthly pay as you go which is like £6 I think and used it like this, I wasn’t sure if I was doing anything right, I’m using android on punting phone, so just made a random google account with fake details, and this number isn’t linked to anything other than making booking, I just downloaded what’s app so I don’t know if there anything I need to be aware of when using it.