What aircraft "don't respond well to tarmac runways"? On the Shoreham Airfield Website they wrote, they have a tarmac runway for most aircraft and a grass strip (actually two) for "aircraft which need a grass strip".

Quote:


  We appreciate that older, more fragile planes don’t respond well to tarmac and that’s why we offer both grass and tarmac runways to cater for a wide range of aircraft.


Page link


What aircraft are those not responding well to tarmac? What does it mean they don't respond well to tarmac? I could imagine this to be old WW2 Aircraft or similar.
No airplanes absolutely need a grass strip, but for some taildraggers (airplanes which have a tailskid instead of a wheel) it's a real benefit because the grass is softer on the skid, and the friction of the grass improves control on the ground and helps slow the plane down. Pavement isn't that big a problem for skids make from more modern materials, but you can imagine it's not going to do a slab of wood much good. Many vintage designs have no brakes or poor brakes, so having grass makes a big difference when landing, on pavement you'd end up rolling a lot longer and have less directional control at low speed.