Should eBay sellers and Airbnb hosts pay tax?

Many Brits like to make some extra income by selling items on eBay or renting out a room on Airbnb, but many are unsure whether they have to pay tax on these earnings.
Now, cloud accountancy software company FreeAgent has warned these online sellers and room sharers that they could face a £100 fine if they don’t submit a tax return and risk further penalties for any outstanding tax.
HMRC is getting more sophisticated at tracking these kinds of online transactions and, as always, ignorance is not an excuse that washes with the taxman.