I do not believe this is possible, Lyn, and this part of the new Building Regs (designed to save energy in the UK) doesn't seem to be have been thought out.
Although it is technically defeating the very purpose of the Regs, the only solution I know of is to change the pendent. New ones should you about �1 each.
By doing this, one is making the house in minor breach of Building Regs, so just keep the old fitting and change them back before you leave. You do not need to be a qualified electrician to change a light pendent fitting