It may not match the wonderful images taken from further south but 45P is definitely available from the UK if you have a decent horizon. Here is my image taken from Middle Hope, Somerset, tonight. It was a glorious clear sunset so I climbed to the top of this headland in the Bristol Channel and set up my Canon 550D and Star Adventurer mount. The sky finally got dark enough around 1800 UT when the comet was around 5 deg above a sea horizon. If you use your imagination the comet has a tail of rather more than half a degree in the image.