Hi welcome to the site. For the first section take a look at the
Best Play publication, page 33+ looks at the different play types and describes what they are so you can identify activities/situations that happen within your setting.
Then take each one of the examples you identify, for example for communication play (Play using words, nuances or gestures for example mime, jokes, play acting, mickey taking, singing, debate, poetry.) maybe children were engaged in reciting a nursery rhyme? Alone, or taking turns, joining in together to enact the words of the rhyme. To fulfil the next part of the criteria, look at if the nursery rhyme was spontaneous? was there any goal to the rhyme - if it was a group activity led by an adult the goal would be to complete it? Then for the next part of the criteria, were the children content during the activity, were they happy, taking turns cooperatively?
To design a play space think about what works well in your setting. Can all children use all areas of the room - bookcases, toy boxes, easels, are tables at good heights, is there enough pace between furniture for a wheelchair? Can children come together as a pairs to communicate, small groups and for solitary activity if wanted?
Sources for information could include
Communication friendly spaces
Physical activity guidelnes on gov.uk
Level 4 Handbook on amazon.co.uk
Hope this helps a little xx