Flat tyres are a bothersome situation so it's best to be prepared and invest in a Topeak bike pump and puncture repair kit before getting stuck - (possibly in the middle of the countryside with only a herd of cows for company!).
Before such a scenarios arise it is best to keep a bike pump attached to your frame is a good idea so it's always there in an hour of need.
Thankfully, Halfords are on hand with a great range from basic hand pumps to high performance track pumps - even pumps that can be mounted on the bike frame. And for puncture repair, we have a range of puncture repair kits and tyre sealant too.
Bike pumps will also help you to maintain your bike tyre pressures at the right level, vital for grip and control while riding.