100mm In Line Bathroom Extractor fan with Run On Timer 4 inch Loft Mounted Inline Shower Ceiling Powerful Ventilation Damp Control 100 mm Silent In-line Toilet Ventilator : Amazon.co.uk: DIY & Tools
White Bathroom Extractor Fan 100mm / 4" Wall Ceiling Toilet Ventilator WGB100 5905033301740 | eBay