Although the lack of Manchester places of worship is apparent, other websites include Best Modern Churches which features some good post-war UK examples.
The ‘Taking Stock’ initiative is a partnership between the Patrimony Committee of the Bishops’ Conference, English Heritage and Roman Catholic dioceses. It has assessed the significance of all Roman Catholic churches and chapels in the Dioceses of Shrewsbury and Salford.
An army of church enthusiasts have contributed to the ‘Churches in the UK and Ireland’ website which documents churches from all periods.
Further afield, there is the work of the French photographer, Fabrice Fouillet
If you want to do some background reading, then visit the Glasgow School of Art’s Catholic Church architecture site for a definitive list.