With the summer transfer window having now come and gone, finalised squads – until at least January – will take the field on a busy Wednesday night of football.With plenty of action taking place in both the Scottish Premiership and English Championship, we’ve picked out a trio of best bets from Wednesday’s schedule north and south of the border.talkSPORT BET – Score up to £30 in free bets – CLAIM HERE*Bet of the DayMillwall to beat Wrexham @ 23/20Millwall will look to bounce back from their first defeat of the season when they welcome a struggling Wrexham side to The Den on Wednesday night.The Lions earned 2-0 and 3-0 wins over Bristol City and Norwich City in their opening two league matches before a 5-1 hammering at Southampton.Wrexham are without a win after their first three games of the Championship campaign, drawing with Cardiff City and Watford, before a 2-1 defeat at home to Birmingham City last time out.Millwall earned a 2-0 win at The Racecourse Ground when these sides last crossed paths in the Championship back in February.Given the contrasting form between these sides and how the Lions dealt with the Red Dragons in their last meeting, Millwall are good value at 23/20 for the home win in this one.Bet BuilderMotherwell to win & Both teams to score – No @ 5/2Looking at a simple two-fold Bet Builder that comes in at attractive odds, look no further than the action at Fir Park, as Motherwell host Dundee United in the Scottish Premiership.The Steelmen have enjoyed an excellent recent record against the Terrors on home soil, winning each of their last five meetings at Fir Park.With the last two encounters between these sides at Fir Park both ending in 2-0 victories for Motherwell, the hosts to not only win on Wednesday night but keep the Tangerines off the scoresheet gets the green light.AccaDundee and St Johnstone to draw, Rangers to beat Falkirk, St Mirren to beat Kilmarnock and Celtic to beat Aberdeen @ 13/1Focusing on the Scottish Premiership, this four-fold acca comes in at attractive odds of 13/1.Two of the last four meetings between Dundee and St Johnstone at Dens Park have ended in 1-1 draws and another stalemate is predicted in this one.Rangers thumped Falkirk 6-3 and 5-2 on their last two visits to the home of the Bairns and another Light Blues win gets the thumbs up.St Mirren sit in second place in the table after a strong start and they are fancied to beat a Kilmarnock side who have lost all of their first three league games this season.Finally, Scottish champions Celtic are the only team with a 100% winning record after their first three games and the Hoops are tipped to overcome Aberdeen at Parkhead.talkSPORT BET – Score up to £30 in free bets – CLAIM HERE*Odds correct at time of publish and subject to change.Remember to gamble responsiblyA responsible gambler is someone who:Establishes time and monetary limits before playingOnly gambles with money they can afford to loseNever chase their lossesDoesn’t gamble if they’re upset, angry or depressedGamCare – www.gamcare.org.ukGamble Aware – www.gambleaware.orgFor help with a gambling problem, call the National Gambling Helpline on 0808 8020 133 or go to www.gamstop.co.uk to be excluded from all UK-regulated gambling websites.Commercial content notice: Taking one of the bookmaker offers featured in this article may result in a payment to talkSPORT. 18+. T&Cs apply. gambleaware.org*18+ New Customers. Opt in, deposit and bet £10 on any football market (odds 1/1+) within 7 days of sign up. Get your initial stake back (up to £30) credited in set football markets. Free bets expire in 30 days. Scroll Down for T&Cs. GambleAware.org | Please gamble responsibly 18+.