Signalling problems caused by the strike, which happened at around 1.15pm yesterday, had meant no trains were able to run on the line between York, Harrogate and Leeds.
Passengers can expect delays up to 15 minutes, North Rail said.
Network Rail said this morning that problems were continuing to cause delays of up to 15 minutes between Leeds and York via Harrogate.
A statement on the company’s website said: “The 07.34am Harrogate to London Kings Cross service will start from Horsforth and not call at Harrogate.
“These delays are expected to continue until approximately noon.”