Some useful links for you:

Hilton Brighton Metropole Windsor Restaurant.  http://www.hilton.co.uk/HiWayWeb/appmanager/portals/hotel?_nfpb=true&_pageLabel=hotel_dining_detail&diningId=295&ctyhocn=BSHMETW

Simply Mamma Mia: 
www.simplymammamia.co.uk

Stylish Events Ltd Wedding business Exhibitors:
http://www.stylisheventsfayres.com/weddinglinks.html

Also represented by Pete Williams Entertainment Services:
www.pwes.co.uk/Helena.html

Also represented by SAM Entertainment Agency:
www.samlive.co.uk/act.php?aid=549&cid=7

Also represented by Midsummer Music Agency:
www.msmusic.co.uk/01style/band_details.asp?bandID=1598372554

Great live-musician backing tracks from:
www.jazzbacks.com

Rob Quickenden, Ford Lane Studios, Arundel, W. Sussex, 01243 552338, www.fordlane.com.  Amazing resident engineer.

St. Mary's House, Bramber, BN44 3WE.  01903 816205.  www.stmarysbramber.co.uk.  Ask for Vanessa and she will take care of you.  Beautiful wedding venue.