Confirm your age. Are you 18 or over?
Blackett, 22, originally joined Whitby from Gateshead in December, and has agreed to extend his loan.
He has made nine appearances for the club since joining, scoring seven goals.
Keep up-to-date with our exclusive email newsletters.
Digital advertising by Minute Media
© Pitch Hero Ltd 2008-2020
Pitch Hero Ltd Registered in ENGLAND | WF3 1DR | Company Number - 636 1033