Airbornestu regarding your post #21, I think you have a far greater understanding of the airspace over the UK than you give yourself credit for, notably your recognition that without an IR you can't operate in Class A airspace; not something that all pilots realise.
Do be mindful, however, that Class D is accessible to you in VFR (and under SVFR in certain conditions) and don't be afraid to ask. ATC should only refuse your proposal for their traffic reasons, but may need you to modify your routing on a tactical basis.
To get someone else of experience to cast an eye over your plans is a good idea. Whatever you do, enjoy the flying and always have an alternative plan in mind in case "Plan A" can't be achieved.