I meant to post this earlier but a combination of a busy job and an attention seeking 3 year old - well dads will understand...One of my rear wheel spokes, also on a Pro-Connect, broke near the hub yesterday :-(
Took it to Evans. They didn't have the part but more importantly didn't have a slot free in their workshop for 16 days! :-((
Their mechanic said that for the weight of the bike, the Pro-Connect is under-spoked. He expected at least 36 spokes (to the current 24).
Will contact 50Cycles on Monday. They have been very helpful.
I broke 2 and bent a further spoke on the WH-8R25 rear wheel of my Pro Connect in September this year. Just to put it in context, I only use the Pro Connect to commute between Richmond Park and Canary Wharf in London, a round trip of about 35 miles. The breaks came over a 4 week period.
50 Cycles replaced the wheel with an SG-S501 Alfine 36 spoke wheel (this is the replacement as 50 Cycles told me that Shimano has stopped making the WH-8R25 - draw your own conclusions).
50 Cycles responded professionally and quickly to my phone calls. The whole thing took about a month due to slowness at my end (job and child as stated before). Unfortunately, I haven't been really able to stress test the new wheel due to winter and recovering from flu.
The whole replacement was free. 50 Cycles has some kind of deal with a cycle hire shop in Richmond and the mechanic there did the job (very nice guy - would recommend!).
Of course, the whole experience was not positive but given that mechanical problems do happen, the service received was excellent - it shows that I can expect good after-sales support.