Don't cut it, simples.
Last house, loads of grass. I asked the RHS how to kill a particular weed. Answer, longer grass and in the orchard let it grow cutting only paths through until the autumn.
We had everything from snow drops, blue bells, daffodils, horse chestnut, dasies, plantains, and best of all orchids both common and spotted. When we left we had over 8 dozen of the common. Just hope that people who bought the house leave well alone.
New house, still larger lawn than we really wanted. Use the lawn mower on high cut (3) and it stayed green in last year's hot weather but still produced nor clippings than i could compost. This year trying 4 cut. So far so good, one cut didn't fill the collection bin.
