Advice for Beginners
Astronomy on a budget of £100
Unfortunately you aren't going to get much for your £100. The telescope will be made of cheap plastic and the lenses will be of poor quality and the lens will generally be small and not able to let sufficient light in for you to see objects with any clarity. You may well be better advised to invest in a better pair of binoculars and possibly a tripod to put them on for longer viewing times.
That said, you can pick up a Meade 90mm telescope with a tripod and a couple of lenses. B ut they do use a lot of batteries and a full set my only last you a couple of hours.