Yup.. in fact ...it will be a double scam.
One scammer will be the Nigerian in his own country who will try to scam your details from you so he can pay you his money into your account...the oldest scam around
The other scammer is the dodgy call regulator company in this country who offers the redirect service on 04470 ..... phone numbers. They make their living by charging you a fortune per minute for redirecting you to the guy in Nigeria .... just so you think you are calling a UK number.
If you ever see +4470.... in an advert.. you can be sure you are going to be fleeced for the call if you dial it... regardless the scam at the far end.