It’s a pan and it’s hard?! I had assumed because it is there, it must be an issue and I should get rid of it but, from your comments, maybe not.
The veg does OK (hit and miss, depending on the season with some things doing well one year, others the next), the weeds do even better (willowherb thrives and dock, couch and bindweed if I let them).
The soil water-logs quickly and then dries out quickly (setting like concrete in patches that haven’t been improved with organic matter) but I think that is down to the soil texture rather than the pan – it’s extremely silty.
Thanks for taking the time to respond – your Winter Vegetables book is one of my gardening bibles…..the timings for plantings, in particular, are great.