A lot of police officers in the UK, especially in rural areas, conduct foot patrols for neighbourhood policing duties
UK patrol officers don't carry firearms, therefore pepper spray is necessary and is used as a last resort. We have Specialist Firearms Officers for that.
Riot Police (Territorial Support Group, Tactical Aid Unit) is a genuine unit used in all police services. It is used to keep the peace in a riot situation. It contains specially trained public order and Taser officers, alongside medics with identical training.
Military fire engines are used in the British Military when in war zones or at barracks.
Organ transplant/blood bikes are used to carry blood and organs from one hospital to another in a rapid response situation. If someone needs urgent organs or blood and the hospital have low supplies, NHS volunteer blood bikers are able to respond quickly and effectively to deliver the blood or organs.