You'll recall that George Osborne departed from that script last week, when he set out the negotiating stance of the rest of the UK on sharing the pound sterling as a post-independence currency, along with oversight and central banking by the Bank of England.

BBC: Scottish independence: Growth pains or pleasures?

Last month, ratings agency Moody's cut the UK's AAA credit rating, which hit the pound, and the value of sterling has continued to edge down since then.

BBC: Pound falls on weak manufacturing data

Investors and dealers alike will be looking for clues, by way of comments on UK gross domestic product (GDP) targeting, and whether his testimony may shape the future trajectory of the Sterling Pound.

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