Referee appointments for this weekend's games in the Ladbrokes Premiership, Championship, League 1 and League 2.
Ladbrokes Premiership - Friday
Heart of Midlothian v Aberdeen - Willie Collum (BT Sport, 7.45pm)
Ladbrokes Premiership - Saturday
Dundee v St Johnstone - Don Robertson (2.00pm)
Hamilton Academical v Motherwell - Euan Anderson (1.00pm)
Partick Thistle v Kilmarnock - Kevin Clancy (2.00pm)
Rangers v Celtic - Steven McLean (Sky Sports, 12.15pm)
Ross County v Inverness CT - Bobby Madden (3.00pm)
Ladbrokes Championship - Saturday
Dumbarton v Dundee United - Stephen Finnie (1.30pm)
Falkirk v Hibernian - Crawford Allan (12.30pm)
Queen of the South v Ayr United - Steven Kirkland (2.00pm)
St Mirren v Morton - Nick Walsh (3.00pm)
Ladbrokes Championship - Monday
Raith Rovers v Dunfermline Athletic - Don Robertson (3.00pm)
Ladbrokes League 1 - Saturday
East Fife v Livingston - Gavin Duncan (2.00pm)
Queen's Park v Stranraer - David Munro (3.00pm)
Stenhousemuir v Alloa Athletic - David Lowe (1.00pm)
Ladbrokes League 1 - Monday
Airdrieonians v Albion Rovers - Mike Roncone (3.00pm)
Brechin City v Peterhead - Grant Irvine (3.00pm)
Ladbrokes League 2 - Saturday
Berwick Rangers v Edinburgh City - Kevin Graham (3.00pm)
Clyde v Annan Athletic - Scott Millar (3.00pm)
Stirling Albion v Cowdenbeath - Alan Muir (2.00pm)
Ladbrokes League 2 - Monday
Arbroath v Montrose - Steven Reid (3.00pm)
Elgin City v Forfar Athletic - Gavin Ross (3.00pm)
