Let�s say�
Invites/placename/order of service � �250
Ceremony (church, bells, organist, flowers, rings, dress and wedding party outfits, wedding car, licence and fees) - �5,000
Photographer (incl album) - �1,000
Evening reception (venue hire, table decs, favours, welcome drinks, 3 course meal for 120 people, wine + corkage, champagne + corkage, evening buffet and DJ) - �6,000
Wedding cake - �250
Gifts - �500
That�s about �13k, obviously you could do without some of that, but equally some of those things will cost you less/a lot more. On top of this you might have enough change left over for a honeymoon. I have been to a wedding where the bride arrived by helicopter��..