Worried about potential soil contamination
our house in east London is built on the site of a metalworks factory which I believe existed on the site for most of the 20th century, before becoming derelict in perhaps the 1970s and eventually demolished in the late 1990s. For this reason I'm a bit concerned that the soil in our garden might be contaminated by metal and other industrial deposits, and therefore not safe to use for growing food, particuarly planting fruit trees.
Would anyone have any suggestions about whether it's possible (and not too costly) to check the soil for possible contamination? And also how possible it is to fix that problem if it does exist?