Transport Minister Ken Skates said the Welsh government’s “prime concern” is safety.
Politicians sent their thoughts to train crash victims during prime minister’s questions on Wednesday.
Speaking in the House of Commons, Deputy Prime Minister Angela Rayner sent her “condolences to those affected by the train crash in Powys”.
Deputy leader of the opposition Oliver Dowden echoed her comments about the crash.
A passenger on the westbound train spoke of being knocked out by the impact after hearing “emergency brakes slam on, then the screeching”.
Bethan Evans, 23, was on the last leg of her journey when the collision took place.
She said the crash had flung people out of their seats into the aisle, and her belongings were also thrown in the aisle.
UK government Transport Secretary Louise Haigh said she was “incredibly sorry” to hear about the crash and safety on the railways is her “absolute priority.”
She added: “We are working at pace with Transport for Wales and Network Rail to understand what happened and how we can better prevent it going forward.”
