Ferris:
Class D airspace:
Flight Rules: IFR + VFR
A/C Requirements: ATC clearance before entry. Comply with ATC instructions.
Were u thinking of Class E in which VFR flights do not require clearance?
There is no class E in UK airspace, or at least none that I know of. We could be viewed to have a slightly different mindset here in the UK in that we think in terms of "contolled" and "uncontrolled" airspace. Class E is not "controlled" from our perspective in that it is not a "controlled" environment, VFR being able to fly through at will. Here, outside of our airways,TMAs, CTAs and CTRs we generally have class G up to FL245.
Hope the sun is shining out there for u. The wx here has a different mindset too!