I opened a cash ISA of about £5k with Virgin Money early in this tax year (2014-2015). But I had no reminder from them about the opportunity to raise that to £15k in July, and consequently forgot all about it until now.
Virgin Money advise me that there was only a 30-day window for that, throughout the UK, not just their own rule, so I can no longer do so. Is that true? I thought you could invest your allowance at any time up to the end of the tax year?