Please keep an eye out for the highlights in two hours' time. We'll be back tomorrow with live text coverage and live radio commentary of the weekend's first Scottish League Cup semi-final at Hampden, between Dundee United and Aberdeen, plus all the rest of the day's action. Thanks very much for joining me and my radio colleagues this evening. All the best.
- James Dayton scores winner on St Mirren debut
- Buddies move above Motherwell into 10th place
- Thistle produce disappointing performance
Partick Thistle manager Alan Archibald
"(We were) Very poor. We found it very hard to break them down. We had a few half chances. We've got to do more, especially being the home side. The conditions didn't make for neat passes in the middle of the pitch. When you start badly it is hard to get out of that. We've got to bounce back. We've got a cup tie next week."
St Mirren manager Gary Teale
"(On giving James Dayton his debut) It was a master stroke or a bit of luck. I said to James I was looking for him to make an impact. I've been praising the boys for their performances over the past few weeks. I hope it's not another 31 games until our next clean sheet. I thought we dug out the result tonight, though Partick Thistle did not really work Mark Ridgers. It's a collective spirit we've got here. Jim (Goodwin) and Marc (McAusland) were outstanding, especially the way they were dealing with the balls down the middle. It's very satisfying."
We'll have the managers' reaction in the next few minutes, though Alan Archibald may first take an extra few moments to go over the match with his Thistle players...
BBC Scotland football pundit Willie Miller
"The two St Mirren centre-backs were wonderful, McAusland just ahead of Jim Goodwin. The back four were excellent but in front of them it was pretty disappointing. That is a wonderful result. They are now above Motherwell. Gary Teale will be delighted."
Well, that will never be described as a classic. Well done to St Mirren for the victory, though they really did not look like adding to that James Dayton goal. Their gestures at the end suggest they know how valuable the three points could be. Partick Thistle were out of sorts. Manager Alan Archibald will be very disappointed with that display.
Stephen O'Donnell's long ball into the box is headed on by the Belgian Frederic Frans, only for Mark Ridgers to dive on it and end the Jags' hopes of a point.
The home fans are imploring their players to push on. They do so and win a corner kick, which is headed some 40 yards clear by St Mirren's Kenny McLean.
The attendance at Firhill tonight is 3,864. There are four minutes of added time to be played.
St Mirren's Steven Thompson is subbed with a few minutes of the 90 to go, winger Gregg Wylde his replacement.
BBC Scotland commentator Rob Maclean
"It's been a mystifying performance, this, from Partick Thistle because we've seen what they can do when they're at their best."
Talking of which, Stephen Mallan's corner flies over Jim Goodwin's head, takes a bounce on the hard pitch and drifts agonisingly over the bonce of Marc McAusland on the six-yard line.
Now, we'll have highlights of the match going online at midnight. Five minutes' worth have been pencilled in but we could be struggling to achieve that. Unless there's a late bit of goalmouth action...
St Mirren manager Gary Teale has a consoling word, one assumes, for midfielder Isaac Osbourne as he is substituted.
The game has fallen into a lull, just when you'd expect the home team to be throwing everything to earn a point or more.
BBC Scotland commentator Rob Maclean
"Thistle seem to lack belief in their ability."
There have been precious few chances in the match, though just there we had at best a half-chance as Ryan Stevenson's lofted cross from the right is attacked by Frederic Frans at the back post, but St Mirren keeper Mark Ridgers had closed him down sufficiently to smother the danger.
Thistle manager Alan Archibald sends on 19-year-old Declan McDaid for Abdul Osman.
Thistle's Abdul Osman sends Isaac Osbourne into the evening air as he is fractionally late with his challenge in midfield.
John McGinn is booked for late challenge on Thistle's Ryan Stevenson, and scorer James Dayton looks to have pulled his hamstring and limps off to be replaced by Lewis McLear.
Former Aberdeen manager Willie Miller
"Thistle need to be more patient. St Mirren will be delighted if they keep pumping the high balls in towards them."
Gary Teale makes a change for St Mirren, sending on Sean Kelly for Isaac Osbourne, and for Thistle Gary Fraser comes on for the injured Kallum Higginbotham.
Partick Thistle's Abdul Osman is yellow carded for a foul on Isaac Osbourne as the pair contested a 50-50 ball. The Saints player got there a fraction before his opponent.
The home fans howl for a penalty as Callum Booth's run across the edge of the box is ended by Jim Goodwin, who leant into the player. That would have been a marshmallow-soft decision had it been awarded.
Referee Kevin Clancy has had a quiet night, with just a couple of second-half bookings to trouble him.
Jags midfielder Steven Lawless clips Saints midfielder Kenny McLean as he make a break away from the visitors' defence and is shown a yellow card by referee Kevin Clancy. St Mirren's Stephen Mallan is next to have his name taken as he is late with a tackle on Abdul Osman. Not much in that one, really.
BBC Scotland football pundit Willie Miller
"Abdul Osman is the out ball for Thistle. I think Kenny McLean has got to get much closer to him."
Partick Thistle have the first attempt on target of the second half as Callum Booth plays in Steven Lawless. He has his back to goal and, though his turn is not quite vintage Kenny Dalglish, he does create enough space to ping a shot at Mark Ridgers' goal. Lawless's effort lacks venom but the Saints keeper dives on it like it's a dangerous snake, nonetheless.
So good from Abdul Osman - good reading of the game to pick up possession, nice change of direction to make space, but a pointless long ball gives St Mirren possession.
Partick Thistle kick off the second half in search of a leveller.
Former Celtic assistant manager Murdo MacLeod
"Stevie Thompson is having to come back to defend so there is no out ball for St Mirren. He has not had one ball to attack."
Former Scotland captain Willie Miller on Partick Thistle
"They have brought it on themselves for not starting the game properly. You must go out there and dominate the game early on. I think it is a real weakness when that happens. They have gone on and dominated the game - credit to them - but the damage has been done. They all know that the first goal is so important in games. It gives a team something to hang on to. The position St Mirren are in, every point is a prisoner."
Mark F: "James Dayton's beard is so beautiful. St Mirren sitting back too much, waiting for Partick to score but hope we can hold on #bbcscotfootball"
St Mirren's talented young midfielder John McGinn is put under pressure by Thistle's ever-eager full-back Stephen O'Donnell, a player likely to leave the Jags in the summer, if not before.
What a valuable three points these would be for Gary Teale and his St Mirren team. They have been under the cosh for most of the half, with little on offer up front from Stevie Thompson, who is clearly not at full fitness. However, the Jags have gone close and you imagine that they will eventually take one of their chances if they keep coming at this rate.
Kenny McLean is sent sprawling by Thistle's defensive midfielder Abdul Osman. A few moments later Steven Lawless, out on the left wing, swings in a cross to Kallum Higginbotham who lays the ball off to Ryan Stevenson, but the skipper's shot whistles past the St Mirren goal.
The Partick Thistle fans display a banner at Firhill.
In an immediate counter-attack, Jeroen Tesselaar sets up Kenny McLean who pulls his left-footed drive a few feet wide of the far post of Thistle goalie Paul Gallacher.
Ooooo! Two chances for the Jags as Callum Booth curls a beauty of a cross for Ryan Stevenson to attack but he misses it by an inch with the goal gaping. Kallum Higginbotham picks up the ball and sets up Stephen O'Donnell who smashes a shot that is well saved by Mark Ridgers.