Mac mini and AirPort Extreme Power Supply US to UK

Recently relocated to UK from Canada bringing my Apple devices. I'm confident to run MacBook Air on travel adaptor because of supplied inline transformer. Do I need a different power supply for AirPort Extreme and MacMini as both were supplied in Canada with "straight through" connections? Unsure if a standard travel adapter will damage hard drive over time. Are switching power supplies standard in both units? Any advice gratefully received. (I'm here in the UK permanently so looking for a long term solution)