Going back-Farringdon - Denmark Hill is a pain too. Train stops at Blackfriars and you are in the middle of the bridge (& river) no way to see which platform the connecting train leaves from. It is necessary to run across the river down two flights of steps, up two flights of steps- 1/2 way across the river again to see if it is platform 1 or 3 that you need- it can be bad luck and the first platform was the better option- in which case it is up & down the stairs again.