Local and national contests - many delayed by Covid - are taking place in England, Scotland and Wales.
Disgraced broadcaster Ray Teret attacked and abused children as young as 12 in the 1960s and 70s.
Jurors hear more than 30 examples of statements being reviewed and often amended.
Ch Insp Dale Sexton admits "fundamental deviation" from guidance on the night of the bombing.
Robert Schofield says he felt "compelled" to set up patrols after the "disgusting" attack.