The UK government has announced a little extra tax relief aimed at encouraging what the chancellor termed ‘micro-entrepreneurs’ in yesterday’s budget — albeit the other beneficiaries here are likely to be gigantic tech platforms like Airbnb if Brits take up the invitation to rent out their spare rooms for a little tax-free extra income. The new tax break also applies to selling goods online so tech platforms such as eBay and etsy may also see some extra uplift in the…