Kensington on Wikipedia.

Project Gutenberg has "The Church Index:  Part 1", by the Rev. William Pepperell, 1872 edition. It includes many drawings of the churches of Kensington, South Kensington, Brompton and Notting Hill.
 

Bethesda Baptist Church (Strict and Particular Baptist, 1866) on Kensington Place and Newcombe Street. Another view. TQ 2532 8033. Both © Kevin Price (2021). Link.

Church of the Immaculate Heart of Mary (aka Brompton Oratory) sits on Brompton Road. Interior view. Both © Mike Forbester. Another fairly similar interior view, from an old postcard in Christopher Skottowe's Collection. Link.

Church of Jesus Christ of Latter-day Saints (1961) on Exhibition Road, almost opposite the Science Museum. TQ 269 793. © Martin Richter (2012). Another view, © Paul E. Barnett (2014). Link.

Ismaili Centre on Cromwell Gardens and Thurloe Place. TQ 269 790. © Martin Richter (2012). Link1. Link2. Link3, on the roof garden. Wikipedia articles on the Centre, and the history of Ismailism.

Our Lady of Victories (R.C.). TQ 252 793. © Andrew Ross.

St. Barnabas, on Addison Road. TQ 245 793. © Andrew Ross.

St. Mary (consecrated 1961) on Edith Road. Another view. Both © Gerard Doherty (2013). Link.

St. Mary Abbots. From an old postcard in Reg Dosell's Collection. Link.

St. Paul (interior view), on Vicarage Gate. Badly damaged during WWII, it was subsequently demolished. From an old postcard in Judy Flynn's Collection.

St. Philip on Earls Court Road, South Kensington. TQ 253 789. © Andrew Ross. Link.

St. Sarkis (Armenian Apostolic Church). © Rob Brettle.