I have a copy of the new Highbury & Islington to West Croydon timetable which is until May 21st which confirms Michael's information. 0553 to H&I.
I wish they'd publish the Southern times also, instead of having to pick up the Southern pocket timetable too.
For complete times from Forest Hill for both types of service the National Rail search site at
http://pda.ojp.nationalrail.co.uk/en/pj/pj or the live departure board at
http://pda.ojp.nationalrail.co.uk/en/pj/...rd/dep/FOH are the only current solution I know of. Those URL's (mobile phone friendly) both cover services from FOH to HHY as well as LBG. That's something I have not been able to get out of the TfL online services yet which seem to ignore the national rail services.
If you want a printed version incorporating both it suggests contacting National Rail may be the best chance at present although TfL may catch up at some point.
Glad to see the departure board on Platform 1 is back to normal after they abbreviated Islington today.