There are three main places to find recordings of Peter preaching and teaching:

Trinity Chippenham’s website … Peter preaches often and the archive is always up to date.

Cor Deo archive … this includes messages Peter preached before Trinity Chippenham began, so there is a stock of messages available here. … if you search “Peter Mead” you will find teaching sessions, short answers to questions and interviews that Peter has done at the European Leadership Forum.