By Huw Jones LONDON (Reuters) – Smaller stock exchanges in the European Union should be exempt from having to supply market prices to a real-time record of transactions for investors, a senior EU lawmaker has proposed. An EU draft law is mandating “consolidated tapes” to mesh stock, bond and derivatives markets spread across 27 countries by forcing platforms to supply prices as close to real time as possible to investors. The aim is to enable investors to find the best deals. Exchanges want a 15-minute delay before the mandatory handing over of their data. Banks and investment funds say a tape…