Patios & Decking in Wraysbury.

With a properly restrained edge and a full-bed system rather than a thin mortar dab. Ground beside standing water in Wraysbury's old gravel-pit lakes moves more than ground further from the bank, so we set edging deep enough to hold its line and grade the falls to carry rainwater away from the water's edge rather than letting it pond and undermine the perimeter over a few winters.

Yes, provided the substructure is built for it. We set posts on foundations sized for ground that stays wet for months at a time rather than the drier ground assumption a standard deck spec is built around, and specify timber and fixings rated for sustained moisture. A deck built to a generic spec on a high-water-table plot is the one that starts moving within a couple of seasons.

Usually more fall than a standard patio, not more pipework. Because a soakaway is unreliable where groundwater already sits close to the surface, we grade the paving to move rainwater across the surface toward a permeable area or the garden itself, away from both the house and the water's edge, rather than relying on the ground to absorb it locally.

Sometimes, and it depends on what the original base is doing. We check the existing surface for level, drainage and any settlement toward the lake edge at survey. A base that is sound gets built onto; one that has already started to move toward the water is not worth extending, and we would rather say so and rebuild the affected section properly than add new paving to a perimeter that is still settling.