In message , Tristan
Miller writes

I suppose. I just found it strange that the station lacks an Oyster card
reader, when every other station I've been to in Zones 1–3 has one.

Until recently the only stations that have readers are the ones where
PAYG can be used.

That is obviously changing with the imminent introduction of PAYG on
almost all of National Rail in the London area.
--
Paul Terry