AUTODOC has 39% off today, was 41% yesterday. Will probably be 25% tomorrow, but worth waiting (normally maxes out at 41%).
Today CS rear springs are £26.27 and Monroe shocks are £36.90. I don’t know the CS springs but Lesjofors are reliable at £35.17. Monroe shocks are OK or Sachs (OEM) are available at £50.52. You’ll want top mounts too, but even decent ones are less than a tenner.
Fronts springs are about the same (Lesjofors £33.52) but shocks are considerably more (Sachs £89.13) and you may need extra kit like spring pads/plates and bump stops. Top mounts are about double the price of rears.
Both are doable for a competent DIYer, although you will need a set of spring compressors for the fronts, £25ish from eBay.
Depending on where you are, you may be able to find someone to help.