That happened after Covid, along with 2 of the 6 per hour being chopped Mon-Sat, to accommodate the Camp Hill services. Nowt to do with cost cutting.
I travel regularly from Bromsgrove on a Sunday. The second hourly electric was dropped a few months ago. (Well not long after new year, IIRC)
I know because I showed up expecting it; only to find the next service was the Hereford diesel.
I also use the Thameslink service to/from home, which (via Dartford) is also being cut.
Avanti West Coast services are also, guess what, being cut.
I'm not happy that the services are being cut back. There's no schadenfreude here.
But the government has decided that there's no more money so services must be cut.