The Llanishen Group of Parishes is a group of small churches that work closely together. The usual pattern of worship in these parishes is as follows:

First Sunday of the month
9.30am Holy Communion in St Michael’s, Llanfihangel Tor-y-Mynydd
11am Holy Communion in Trelleck Grange

Second Sunday of the month
9.30am Holy Communion in St Denis, Llanishen
11am Holy Communion in St Tysoi’s, Llansoy

Third Sunday of the month
11am Holy Communion in Trelleck Grange

Fourth Sunday of the month
9.30am Holy Communion in St Tysoi’s, Llansoy
11am Morning Prayer in St Denis, Llanishen