I have just bought a Coopers DIY beer kit and have started my first ever brew. Ive notticed at the bottom of the fermenter there is a lot of sediment is this normal or have I done something wrong? Any help would be greatly appreciated.
A quick Google on the name tells me that this is an add water, sugar and yeast kit, so I am guessing you are referring to sediment in the fermentation bucket. In that case, the sediment is a perfectly normal part of the process. The yeast, which is doing its job of producing your alcohol, is multiplying, flocculating (clumping together) and settling out.
When it comes to bottling, don't disturb the sediment, just leave it behind in the bucket. Enjoy your brew, before you know it you'll be doing another!
Coopers is a nice brew - I used to drink it when I was in Melbourne. However, the tradition then was to roll the bottle to stir up the sediment and drink it. I could never taste the difference. However, I wouldn't advise that with your homebrew - it might taste a bit yeasty/bitter. Probably best to leave it in the bottom of your bottle!