I have heard that I may not be able to do this from March with me having no transponder...can any of you guys confirm.
No, so long as you make arrangements with the controlling authority in advance.
I wonder if, given that the Class D at Norwich comes into effect in March, you are refering to that?
No matter, it is preferable that prior to the flight, you make the time to ring them and inform them of your requested routing, explain that you have no transponder and arrange to call them at an agreed time or position prior to entering Controlled Airspace.
Most ATC units are quite affable about this and it's better than having to worry about flying underneath or outside Class D, which can be particularly tricky if you have to avoid weather.