I'm American and my fiance is English. We're getting married in Cornwall. I am aware of tipping customs here in the states, but I am unaware of customs in England. Who should receive a tip and how much should it be?
You're not expected to tip any of your wedding suppliers for the service they provide.
There is no need to tip individuals or companies that supply you services at wedding rates. However, you may have family or friends that provide you with goods or services at lower than normal rates that you may wish to reward in addition to the sum charged. For example, you may have a friend that offers to do your hair or make-up or a relative who offers to make your cake at cost. However, it is more appropriate to acknowledge their kindness by buying them a small gift as a memento of your special day.
If you feel that your reception venue provide excellent service on the day, you may wish to tip individual waiting staff, but it's completely up to you.