I am just looking at replacement tanks for water, and fuel, and noticed that whitworths, arnolds, boat bits charge a bit for their plastic tanks.

I had a thought and looked on caravan sites and noticed that these tanks are at least half of the cost (for the same size) as the ones marketed towards boaters. Certainly these cannot be much different. Can we use caravan tankage?

Any good places to pick up 100 to 150lt diesel tank?

Try Atlas tanks , can be made to any size requirement