In last month's GYO there was a question about arsenic leaching from tanalised timber into raised beds. I want to install raised beds and have done lots of research into this - I have been told that timber treated with Tanalith (which most people treat timber with now), does not have arsenic in it!

Even HDRA Ryton is not flagging up a problem

Anyone else know anything about this? The answer in GYO seems to imply that the only way you can do raised beds safely is with Linkaboard (v. expensive!).