Still no radio coverage as the match resumes... Celtic have made two changes, with Moussa Dembele and Stuart Armstrong on. Kieran Tierney and Olivier Ntcham are off.

And relax... It doesn't look like the game is under any threat as the floodlights are on and the teams are back out.

Our radio coverage is now somewhat limited since all contact has been lost with the commentary team inside the stadium.

What the what now? The power has suddenly gone off at Tynecastle. Has Brendan Rodgers been tampering with the wiring?

Can Hearts keep up this frantic work-rate? They deserve a double ration of half-time oranges after putting in a real shift.

Image source, SNS

By way of contrast, Hearts have been fantastic, playing with incredible energy and gusto. Don Cowie has been outstanding in the middle of the park and Michael Smith is doing a grand job as a makeshift central defender. Craig Levein has them playing narrow and that has isolated the threat of Celtic's wide men, with Scott Sinclair barely getting a touch.

Celtic are looking down the barrel of a first domestic defeat since May 2016.

The visitors have been outfought in midfield and have been all over the place at the back, while Leigh Griffiths has not been at the races up front.

Well, well, well... The 'invincibles' are on rocky ground against rampant Hearts at Tynecastle.

The home fans are having a ball as the teams trot off, having celebrated two cracking strikes from Harry Cochrane and Kyle Lafferty.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

"I thought it was a little bit stupid from Lafferty - he forgot about the ball completely, let it run over the touchline and put his hand into Tierney's face. That's him booked now - that goes down as a very, very stupid mistake to make."

A booking for Kyle Lafferty as he puts a straight arm into the chest of Kieran Tierney when shielding the ball out for what was going to be a Hearts throw-in deep in Celtic territory. Daft...

With the interval approaching, Celtic step up their intensity - or have Hearts dropped off just a shade? James Forrest skips past two opponents and threads in another dangerous ball. Leigh Griffiths has a wild swing at it and gets next to no purchase on the shot, which is blocked by Michael Smith.

The champions are rattled. Leigh Griffiths is booked for a challenge on Michael Smith.

Ouch!published at 33 mins

33 mins

Hearts 1-0 Celtic

Hearts midfielder Don Cowie is booked after careening into Dedryck Boyata with a late challenge on the halfway line.

Celtic just can't handle Hearts' furious tempo. David Milinkovic is on to a ball over the top and his shot draws a good stop from Craig Gordon, who did well to advance and narrow the angle.