UK Bag Tax - still confused

Start - 5th October, 2015.  5p charge for a single-use carrier bag in the UK.

If you're still confused, here the break down directly from the Department for Environment Food & Rural Affairs :: https://www.gov.uk/government/publications/single-use-plastic-carrier-bags-why-were-introducing-the-charge/carrier-bags-why-theres-a-5p-charge

Which shops charge for single-use plastic bags?
Large retailers with 250+ employees. The employee limit applies to the whole company not just an individual branch.

Can I avoid the Bag Tax?
Yes - bring your own bag.

What bags are exempt from the Bag Tax?
 - paper bags
 - shops in airports, or on board trains, aeroplanes or ships
 - bags for certain items (unwrapped food, raw meat and fish), prescription medicines, uncovered blades, seeds, bulbs and flowers, or live fish

Are biodegradable bags exempt?
No - but this is under continual review.