Returning to an old design can feel uncomfortably personal. You remember the constraints, the decisions that seemed reasonable and the version of yourself who made them. With HARTT, the useful move was to stop asking whether the first website was good and ask what the organisation and its visitors needed now.
The redesign started with structure rather than decoration. Programmes, performances, news and organisational information needed clearer relationships. A stronger visual system mattered, but only after the paths through the content made sense.
I also wanted the new direction to feel like HARTT. Colour, hierarchy and responsive behaviour were treated as parts of one website system across desktop and mobile, not as a collection of disconnected screens.
Growth is not proving that your earlier work was wrong. It is being able to see its limits clearly, preserve what still works and make better decisions with what you know now.