Hi All, I'm from the Yorkshire Wolds Railway near Driffield in East Yorkshire. We will soon be relaying 'the next field' from our existing site in the direction of Wetwang. The next field is one of only two in a couple of miles where the old formation (compacted chalk) has been excavated & the field has been returned to arable crops. The others are grasses for grazing, being a few inches of top soil over the formation, so much easier. As part of our grant application we have planned to get the next field's formation reinstated at considerable cost. However, various sources have recommended not actually putting the formation back, but more a half-way house of skimming the surface, putting a membrane down & laying grades of ballast on that. Some railways have used this method (we have visited) but some say we'll be forever repacking it! It would of course be much cheaper. I can't envisage our axle weights realistically exceeding 20T; we're only at 10T currently. Your opinions would be welcome, please.