Hi Steve, Lucky escape from the branch or what?
We started a year plus ago to get experts to look after our lawn 4 times a year In the past we bought an electric scarrifier to sort out moss, then bought a wheelie feed spreader, then a spot weed killer spray, and we would do this twice a year. These things are not cheap and a chore to do.  My neighbour and I agreed that we may as well walk up and down the lawns with wallets open and just sprinkle £5 notes all over...to absolutely no effect. So we have a franchise "LAWN Care" to sort things out. They do a brilliant job. Their first visit was to bag-up over 20 black sacks of moss, then re-seed some areas. Since it has been the best ever.  When they feed the grass etc, just be careful , it can rejuvenate and grow quite quickly, as we have found...so set your robo mower to max..? We have no regrets getting someone in who also gives advice.
KR Paul