The homily written by Rev. Nicky Gumbel and delivered by Martin Buck was in two parts. The first was on Psalm 121 and titled God will guard and protect you. The second was on John 3: 1-17 -- Confront people lovingly. The sermon began with some background on Nicky Gumbel. More information is linked above. A pdf version of the homily is also availabe at the link above.
A video of the homily starts 39 minutes and 30 seconds into the Vimeo of the service linked here.