Three bank branches in Gwent House, Gwent Square, Cwmbran The banks occupy ground floor offices in Gwent House. On the left at 40 Gwent Square is The Co-operative Bank. In the middle at 38 Gwent Square is HSBC. Towards the right at 36-37 Gwent Square is NatWest. The entrance to Cwmbran Library is under the canopy on the right.