u/Adventurous_Gear388

Long time lurker, first time poster... Clearing weeds and the garden to find these mysterious holes forming around our drain. There's about two inches of the concrete/tarmac stuff, and the inside is... Squishy.

The drain is still connected up and working fine, although I don't think I want these holes getting any bigger or squishier.

Any tips on what to do here? Absolute noob and not ashamed to admit it, so pleased do talk to me like I know nothing.

Thank you!