I built my London Road up about 3500 miles ago with the Wiggle Lifeline headset. I was never really happy with it (the headset), and had an intermittent cracking noise from the bike somewhere.
When the bearings were worn about 500 miles ago, I replaced the headset for the correct FSA headset – I found it on ebay for £24 (FSA No.42-ACB ORBIT C-40 ACB), as I couldn’t justify paying the going rate from Planet-X at the time (about £50, then frameset only cost me £150!)
I had a job getting the old lifeline headset out (involving a hairdryer, flat bladed screwdriver and a hammer!), the bike has been riding noticeably better with the FSA headset. Cracking noise has gone, and it’s had a fair bit of abuse in the last 500 miles!