Thanks for all the replies, folks.
I ran my final marathon in London 2019. I decided that the length of time out running to train properly for a marathon was unfair on my wife as we wanted to spend more time together. I still run about four times a week and we follow a fitness programme at home until the gym reopens. Lots of walking too so I am keeping well. its over 8 years without needing treatment since my blood cancer diagnosis, although my existing tumours have increased in size and they have found a new one in my stomach, which was a set back. I'm keeping positive though and hope I can return to this site regularly as it was always great fun and a fantastic resource.