I am looking for a hard-tail Mountain Bike for around £300, I only want it for forest tracks and down hill runs thu wood with small jumps only.

I am looking at this one http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_51 2511_langId_-1_categoryId_165499
is this good value or Halford crap? and can any recommend another bike please?
Thanks