Angela Rayner has resigned from government after it emerged that she underpaid stamp duty on a seaside flat, breaching the ministerial code.Ms Rayner’s admission followed mounting pressure and media reports alleging she saved £40,000 on the property in Hove, East Sussex, by removing her name from the deeds of a family home in her Ashton-under-Lyne constituency.Her resignation follows the findings of ministerial ethics adviser Sir Laurie Magnus, to whom she referred herself on Wednesday.Sir Laurie Magnus said the outgoing deputy prime minister had “acted with integrity”, but failed to “heed the caution” contained within legal advice she received when buying the £800,000 property in Hove.In her resignation letter, the former deputy PM wrote: “I have long believed that people who serve the British public in government must always observe the highest standards.“While the Independent Adviser has concluded that I acted in good faith and with honesty and integrity throughout, I accept that I did not meet the highest standards in relation to my recent property purchase.”Here, The Independent explains the issue and how it led to the resignation of one of the top figures in British politics:What are the rules around stamp duty?For those buying their first home, or moving from one to another, stamp duty is usually quite straightforward. There are several rates liable on the purchase, ranging from zero to 12 per cent, based on its value. Rayner’s political career hangs in the balance More