There was a change to the door opening procedure on the Reading to Waterloo line a few years back whereby the guard opened the local door and checked the whole train was platformed before releasing the doors. Has this changed again?
No. The requirement is for guards to ensure that the whole train is platformed before releasing doors. It doesn't always mean having to open the local door first and then releasing all doors. How quickly the doors are released varies from guard to guard, some are slower, some are quicker.