What were you doing on the 5 July 2007? I cannot remember either, but the history books tell us that this was the last date when the Bank of England raised interest rates (by a quarter of a percentage to 5.75%). Since this point, interest rates have only fallen, including the most recent August 2016 decrease to the current rate of just 0.25%.
A Budget in October is unusual, but there are two main reasons why the Chancellor’s performance marginally pre-empted Halloween this year. The first is that we are now in the new cycle of Autumn Budgets and Spring Statements, the première of the latter having been made on 13 March.
The value of investments, and the income derived from them, can fall as well as rise. You may get back less than invested. Past performance is not a reliable guide to future returns.