That's nuthin'. Compare the price hike over the past two years! And be glad you don't need a size larger than 11X14. Welcome to the new "norm". It could go higher still, given all the economic chaos in play these days. I use a lot of 16X20 MGFB glossy, and it has actually been priced lower at B&H than MG Cooltone or Classic. It just went up $50, so I'm glad I bought a 50-sheet box in January; but that's still $150 less than what the local camera store wanted last fall. 20X24 has gotten out of my reach.
So far, the UK where Ilford is based, hasn't been threatened by tariffs like the EU per se. But supply chains of necessary ingredients tend to be rather entangled, so who knows what will happen overall. I'm going to print much more circumspectly this season.
What's even worse is how much the price of quality mounting and mat board has gone up in recent years - a double whammy.