Prunung rhododenrons

[kjsgran]

When we moved to our current home 7 years ago we inherited an ericaceous border with Rhododenrons azaleas and heathers.
Over the years we have fed them and nurtuerd them but now some of them are becoming much too large (especially the rhoddies)
Can you give us advice on pruning as to when how and by how much?
Would very much appreciate some advice

Many thanks kjsgran