Updated for 2018: – To add some interest and in remembrance of great results in the past, these are the times to chase in future. Occasionally impenetrable fences appear and necessitate slight deviations as in 2009 and 2010 which probably added a minute to average times. On the other hand the latched gates are quicker than the old stiles, and going over the stream at the end is 15 seconds or so faster than going round the hedge (all races until 2017). All problems are just regarded as hazards of the course, so no complaints accepted!
I have included all people who have done sub 50 minutes, and very old people get recognised for suitably adjusted thresholds.
Senior Ladies: Rhian 46m44 (2010); Pauline 47m27 (2012); Ceri B 49m17 (2016); Tracey 49m19 (2002); Katy B 53m14 (2016); Elen B 56m58 (2018)
Senior Men: Fred 39m07 (1992); Shaun 40m09 (2018); Andy B 40m40 (2011); Tony W 42m42 (2017b); Phil 47m39 (2018); Huw 48m17 (2018)
F40: Tracey 50m00 (2004); Victoria 50m12 (2014); Claire 53m15 (2010); Brenda 55m31 (2004); Sarah 55m32 (2007); Anwen 58m37 (2016)
M40: Brett 42m57 (2011); Alun (2005) and Arwel (2002) 43m55; Glen 44m20 (2017b); Ed R 45m03 (2007); Duncan 45m40 (2002); Geraint 47m26 (2007); Keith 49m57 (2007); Dan 50m10 (2015)
F45: Emma 46m37 (2011); Tracey 49m26 (2013); Budge 56m50 (2007) Bethan 57m54 (2016)
M45: Peter A 43m35 (2009); Glen 43m58 (2018); Alun 45m13 (2011); Paul B 45m24 (2005); Chris 45m34 (2003); Owen 46m41 (2016); David Bk 47m42 (2012); Duncan 48m34 (2007); Martyn F 48m48 (2013); Steve 49m26 (2018)
F50: Tracey 48m58 (2016); Emma 49m43 (2016); Ceri D 49m53 (2015); Budge 51m43 (2009); Mary 60m 57 (2013); Menai 62m20 (2013)
M50: Vic 43m43 (2013); Martin C 45m22 (2007); Owen 46m39 (2018); Ken 46m51 (2003); Chris 46m55 (2004); Duncan 47m06 (2010); Mat 47m47 (2018); Peter A 48m17 (2014); Bob 48m38 (2003); Alun 48m54 (2014); Dally 49m00 (2002); Tony B 49m11 (2014); Martyn F 49m40 (2016)
F55: Emma 50m10 (2017); Menai 58m11 (2016); Vicky 79m31 (2012)
M55: Vic 44m13 (2015); Martin C 44m28 (2011); David B 45m34 (2016); Tony B 49m07 (2016); Chris 49m53 (2011); Peter E 50m51 (2009); Fred 51m 42 (2013); Bob 52m48 (2007); Mike H 53m19 (2015); Ian J 56m23 (2018)
F60: Menai 60m51 (2018); Rachel 78m21 (2013); Vicky 80m00 (2016)
M60: Martin C 46m06 (2013); Fred 49m00 (2016); Chris 52m14 (2014); Peter E 53m06 (2014); Ron 58m24 (2002); Bob 58m35 (2014)
M65: Dave S 53m23 (2014); Ron 54m53 (2003); Bob 55m39 (2016); Gerry 61m00 (2002)
M70: Ron 61m53 (2010)
Most races sub 50: Women; Tracey, 4. Men; Chris, 10. Duncan may be 10 if sub 50 in 1992 and 1993 and 2000 which was quite likely but my full results only go from 2002. Tracey and Chris also have 3x sub 51.