The party says the tax cut will be paid for by reducing public spending by £80bn.
Nigel Farage's admirers in the party are calling for a stronger operation as the party aims for power.
Young supporters give their views as the Reform UK party conference takes place in Birmingham.
Do supporters think Reform UK has lost momentum?
With Argentina's President Milei promising "winds of change" over the Falklands, will Donald Trump shift his stance on British rule?
Sir Keir Starmer is the latest person to take the office as a means of resigning as an MP.
The Reform UK leader promises to deliver on key priorities in the first 100 days of government, if the party wins power.
Nigel Farage has been addressing Reform UK members at the party's conference in Birmingham.
Two senior Reform aides have stepped down from their roles following a Channel 4 News and Verbatim film about donations.
Reform says it would use the Navy to intercept boats and return migrants to France, if the party wins power.
Reform says Dan Jukes and James Orr have left their roles as it launches an investigation into the report.
Dame Angela Eagle warns the weather event could lead to extreme storms this winter.
Can the Reform UK leader put his policies into action, and become prime minister?
Units in the UK not preparing to be deployed have been told to cut back on training exercises due to cost pressures.
Speaking at the party's conference, economy spokesman Robert Jenrick says Reform will be the "party of fiscal responsibility".
The Green Party leader intends to run in the Holborn and St Pancras seat following Sir Keir Starmer's resignation as MP.
Andy Burnham has committed to reaching the Nato target of 3.5% spending by 2035, but not 3% by 2030.
The US president says the UK was not "there to help me" in his ongoing war with Iran.
The leaders also discussed Ukraine and "the UK's drive to get closer to Europe", No 10 says.
Cold War veterans who oversaw nuclear tests have claimed they caused lifelong health problems.