Attending the memorial service, Chief Constable Sue Sim said of Pc Rathband: "He was gunned down in tragic circumstances doing the job of constable he loved.
"My heart goes out to Kath and the children and the rest of the family."
More top news
Not as cold as recent nights - any frost will be confined to parts of Scotland and East Anglia where temperatures will dip below freezing.
A police chief constable has defended his force's handling of child sex allegations against former prime minister Sir Edward Heath.
John Cleese has paid tribute to his "wonderful" Fawlty Towers co-star, Andrew Sachs, following his death at the age of 86.