We used Mustard Catering for our function and there food is very delicate, upmarket and yummy. Excellent for a cocktail party or classy dinner party however not really suitable for something more casual. Prices are not cheap but is worth the quality you get. The staff are excellent, they are there serving all the time but also stay out of the way. They have some great packages available and don't be afraid to ask for a deal as the are willing to negotiate to get your business (within reason I'm sure!). I dealt with a lady, her name started with L but unfortunately I can't remember it - anyway she was terrific.