Swell UK's LDPE Pond Liner is a good quality economy liner that is perfect for small to medium sized ponds. Manufactured from high quality LDPE (Low Density Polyethylene) material, these liners are extremely good value while still maintaining great puncture and tear resistance. The liners are 0.33mm thick and carry a 15 year guarantee against be damaged by the suns UV rays.
Swell LDPE pond liner is better suited for Ideally suited for broader shaped pond as intricate shapes may cause issues folding.
For a more flexible/plyable that is suitable for more complex installations we would suggest installing the Gordon Low PVC Pond Liner (link) or Gordon Low Greenseal Pond Liner.