Gemma's father Anthony McCluskie said today:
"This has been an extremely traumatic year for myself and my wife Carole, my son Danny and his partner Shantelle, Gemma's extended family and all her many friends.....To some of her friends Gem was known as 'Gemstar' or 'Li'l Gem', small in stature, she was huge in personality with a zest for life.
"Gemma was a daughter, a sister, an aunty, a cousin and a niece and is very much loved and greatly missed."
More top news
Acting Commissioner Craig Mackey led new policemen and women in paying their respects at a passing-out parade in Hendon, north-west London.
The tour of European capitals was timed to coincide with the start of the Article 50 process to exit the EU.
The Football League will introduce the project if the family of PC Keith Palmer supports the idea.