Ann: OMA adjusts April revenue, page-6

I thought this as well.

That sector is largely dominated by OML so thought it could be them (shopping centres, offices, cafes).

But Doctors’ surgeries and medical centres would be Tonic Health Media.

I'm going to keep digging

It is a bit odd that only APO did an ASX announcement, perhaps they thought it best to inform the market that the outdoor industry figures as a whole had been over-reported for full transparency, and the real culprit is just hoping to brush it under the carpet.