We have wooden decking in various lengths along with decking screws in 50mm, 65mm and 75mm.
We also stock Smartboard Composite decking boards and the relevant screws. This has a 25yr manufacturers warranty for residential use . It is made of a mix of the residue from the manufacture of Oak flooring (60%), dense polyethylene from shampoo bottles etc. (30%) and additives to help reduce expansion & contraction (10%).
Newel posts and handrails (both as ready made sections or loose components) kept in stock.