It is space along the rows that is key. Ideally you increase it. At worst you don't reduce it. Two ways of doing this: 1. Replace the existing seats (which take up a lot of space from front to back, i.e. 300mm) with rail seats that don't, The slimmest version allowed in England right now takes up only 100mm, i.e. 66% less than the current seats. 2. Don't add any new 'stadium furniture' that reduces the current amount of space, e.g. barriers that narrow the rows by 85mm The im