Home insulation is well worth getting! There are various grants and offers for discounted Home insulation at the moment. Look on your local council’s website.
For the Greater Manchester area there’s a website called Get Me Toasty that gives you information about insulation available
If you want to buy some insulation then B&Q have lots of types to chose from.
It’s well worth adding insulation to your loft space if you’ve not got the full recommended depth of 270mm. You should also ensure your loft trap door is insulated and use clips to make a tight seal.