The 20-year-old, who joined the Baggies last January, will spend an initial 28 days at the League One club.
Allan spent the second half of last season on loan at Portsmouth, but failed to agree a move back to the club this summer.
Allan has been identified as a star of the future.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Leeds UnitedLeeds | 26 | 15 | 8 | 3 | 48 | 19 | 29 | 53 |
| 2 | Burnley | 26 | 14 | 10 | 2 | 31 | 9 | 22 | 52 |
| 3 | Sheffield UnitedSheff Utd | 26 | 16 | 6 | 4 | 36 | 17 | 19 | 52 |
| 4 | Sunderland | 26 | 14 | 8 | 4 | 39 | 22 | 17 | 50 |
| 5 | Blackburn RoversBlackburn | 26 | 12 | 6 | 8 | 31 | 23 | 8 | 42 |
| 6 | Middlesbrough | 26 | 11 | 8 | 7 | 43 | 32 | 11 | 41 |
| 7 | West Bromwich AlbionWest Brom | 26 | 9 | 13 | 4 | 32 | 21 | 11 | 40 |
| 8 | Watford | 26 | 11 | 5 | 10 | 36 | 37 | -1 | 38 |
| 9 | Bristol City | 26 | 9 | 10 | 7 | 33 | 30 | 3 | 37 |
| 10 | Sheffield WednesdaySheff Weds | 26 | 10 | 7 | 9 | 38 | 40 | -2 | 37 |
| 11 | Norwich CityNorwich | 26 | 9 | 9 | 8 | 43 | 37 | 6 | 36 |
| 12 | Swansea CitySwansea | 26 | 9 | 7 | 10 | 30 | 30 | 0 | 34 |
| 13 | Queens Park RangersQPR | 26 | 7 | 11 | 8 | 29 | 34 | -5 | 32 |
| 14 | Millwall | 25 | 7 | 9 | 9 | 24 | 23 | 1 | 30 |
| 15 | Preston North EndPreston | 26 | 6 | 12 | 8 | 28 | 34 | -6 | 30 |
| 16 | Coventry CityCoventry | 26 | 7 | 8 | 11 | 34 | 37 | -3 | 29 |
| 17 | Oxford UnitedOxford Utd | 26 | 7 | 8 | 11 | 29 | 41 | -12 | 29 |
| 18 | Derby CountyDerby | 26 | 7 | 6 | 13 | 31 | 35 | -4 | 27 |
| 19 | Stoke CityStoke | 26 | 6 | 9 | 11 | 24 | 32 | -8 | 27 |
| 20 | Luton TownLuton | 26 | 7 | 4 | 15 | 27 | 44 | -17 | 25 |
| 21 | Cardiff CityCardiff | 26 | 5 | 9 | 12 | 26 | 41 | -15 | 24 |
| 22 | Hull City | 26 | 5 | 8 | 13 | 25 | 36 | -11 | 23 |
| 23 | Portsmouth | 25 | 5 | 8 | 12 | 30 | 44 | -14 | 23 |
| 24 | Plymouth ArgylePlymouth | 26 | 4 | 9 | 13 | 25 | 54 | -29 | 21 |
| > Championship Full Table | |||||||||
