Sorry I've not been back earlier but not felt too well today due to ye olde dam brain chemicals
I souped the HP5+ at 20C for 8 mins 1+50, filled and inverted during the first 30 seconds and then one inversion every 30 seconds. They are still drying at the moment but dry enough to see they are quite contrasty and as far as I can tell have shadow detail and no blown highlights. Might be a few days before I'm up to printing but I think they are very nearly nailed.
Many thanks for the suggestions and the additional information posted here. I'm frequently pushing HP5+ up to 1600 but for some reason never got around to pulling it. Shows what a good effect being here on APUG has on me
Kind regards Tony