with the announcement of the new Cardiff base (the mods here decided to delete the thread I started last week, reasons as yet unclear) it would not surprise me for you to be given the opportunity to go onto the E-jet as a contractor there initially.
Forget about any basing in MAN/BHX and particularly SOU as you would join on the bottom of the seniority list and also the jets are allegedly leaving SOU in the summer due to the poor airport financial deal.
If you fancy going on to the Dash then expect in the region of 30K and 70-80 rostered hours per month at the moment. I joined with previous experience in the last year (albeit not quite with your level of experience) and I love it. Lots of guys going to Jet2, BA at the moment so we are crying out for pilots
Edit: command time you can apply after 1000 hours within the company and 2500 tt so for you circa 18 months if you were willing to move base and accept a command anywhere