Early scan in UK

Una
Hi , does anybody know how to get an early scan through NHS. I had a mmc last year and so booked a gp appointment for 5th dec to see if I can  convince him to book me for one.. I have heard they usually don't bother till u have three mc.. But just can't wait till 12 weeks with the festive season coming up ..and also my last mmc was picked up just before Christmas last year.. So brings back so many bad memories.