All the London railway stations :
Underground lines : Victoria, London Overground (North London line) & (East London line), ThamesLink
AccessAble Access Guide :
Accessibility friendly : Highbury & Islington is not accessible to wheelchair users due to stairs between the platform and street level.
You can change between the northbound platform towards Tottenham Hale (A step 50mm/gap 75mm) and National Rail northbound services. You can change between the southbound platform towards Brixton (A step 50mm/gap 75mm) and National Rail southbound services. Changes are only available going in the same direction! No boarding ramps are available.
No stair-free entrance/exit.
Level interchange between Victoria line and National Rail services travelling in the same direction.
General description : There are eight platforms, which are largely inaccessible except as stated above. See wiki - it looks like platforms 1,2,7 & 8 are accessible by a lift. Take a close look at the Accessable Guide link above.
Platform 1 - East London Line services to West Croydon
Platform 2 - East London Line services to Crystal Palace
Platform 3 - Northbound Victoria line
Platform 4 - Northbound Northern City Line
Platform 5 - Southbound Victoria line
Platform 6 - Southbound Northern City Line
Platform 7 - Westbound North London Line
Platform 8 - Eastbound North London Line
More comment : National Rail Map & Guide . ramps available to board trains.