The window, delayed because of the impact of the coronavirus pandemic, is also set to include a domestic-only period for transfers between Premier League and English Football League clubs from 5-16 October.
For all of the latest rumours, check out today's gossip column and for a full list of the August transfers visit this page.
28 September
Scottish Premiership
Ben Stirling [Hibernian - Hamilton] Undisclosed
International
Kamil Grabara [Liverpool - AGF Aarhus] Loan
Loris Karius [Liverpool - Union Berlin] Loan
Badou Ndiaye [Stoke - Fatih Karagumruk] Loan
Roberto Pereyra [Watford - Udinese] Undisclosed
English Football League
Declan Drysdale [Coventry - Gillingham] Loan
26 September
Scottish Premiership
Michael O'Connor [Waterford - Ross County] Undisclosed
English Football League
Akin Famewo [Norwich - Charlton] Loan
Arthur Gnahoua [Macclesfield - Bolton] Free
Lloyd Isgrove [Swindon - Bolton] Free
25 September
English Football League
Dennis Adeniran [Everton - Wycombe] Loan
Leon Clarke [Sheffield United - Shrewsbury] Free
Bobby Duncan [Fiorentina - Derby] Undisclosed
Gareth Evans [Portsmouth - Bradford] Free
Nicholas Ioannou [APOEL - Nottingham Forest] Undisclosed
Brennan Johnson [Nottingham Forest - Lincoln] Loan
Alfie McCalmont [Leeds - Oldham] Loan
Barrie McKay [Swansea - Fleetwood] Loan
Jerome Opoku [Fulham - Plymouth] Loan
Kyle Taylor [Bournemouth - Southend] Loan
Ben Watson [Nottingham Forest - Charlton] Free
International
Luis Suarez [Barcelona - Atletico Madrid] Undisclosed
Florent Hadergjonaj [Huddersfield - Kasimpasa] Undisclosed
Mbwana Samatta [Aston Villa - Fenerbahce] Loan
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