The IPC Ealing website gives the up to date situation...
Our origins are in the work of missionaries Francis and Edith Schaeffer. The Schaeffer family moved to Switzerland from the Reformed Presbyterian Church (USA) in 1948 and in 1955 established the community called L'Abri (French for "the shelter"). The first IPC church was established in Switzerland in the mid 50's. The L'Abri mission established a base in England and soon after started two churches to meet the need of the people who came to Christ through their ministry: Ealing in 1969 and Liss in 1972. These churches were called 'International Presbyterian Church' and so the English IPC denomination was started.
At the moment the denomination is divided into two Presbyteries (groups of churches): the IPC First European Presbytery and the Korean Presbytery. In the European Presbytery there is Ealing IPC, Liss IPC in Hampshire, Grace Fellowship in Warrington, New Life Massih Ghar in Southall and Hope IPC in Timisoara, Romania. We also have church planters working in France, Italy, Azerbaijan and Belgium . We hope and pray that over the next 5 years we will see significant growth in this Presbytery.
The Korean Presbytery is made up of 6 Korean speaking churches in Ealing, Kingston upon Thames, Reading, Kings Cross and Oxford.