I have had a season ticket for a very long time and when the KP was built picked a nice seat near the back of the lower tier of the main stand with a seat on an isle so I could stretch out an increasingly poorly leg. Quite quickly my mobility deteriorated until towards the end of the season 2010 I was having to use 2 elbow support crutches. At one of the last few games I was given the heads up by our friendly steward that folk like me who might be at risk in an emergency evacuation or perhaps cause an additional hazard to fit folk were to be asked to move to designated areas where their needs could be more easily catered for by addional and specially trained stewards.
Rather than wait until the start of the 10/11 season when the better spots were being taken I applied for a move and was given a seat on a wheelchair platform in H block upper. This and another upper platform are served by a lift and have disabled toilets adjacent. There are, on these platforms, one 'carers' seat for each wheelchair space plus around half a dozen extra seats for ambulant or temporary disabled supporters. These are allocated on either a season long basis or if not sold on demand match by match. In addition the lower tier in H block has been designated a special area for supporters with the extra needs.