Cisco SF300-48P 48 Port PoE 10/100 2x SFP Port Stackable Managed Switch
YuanLey 48 Port Gigabit PoE Switch Unmanaged with 2 1000Mbps SFP Uplink, 50 Port 802.3af/at 800W High Power PoE+ Network Switch, Metal Rackmount Power Over Ethernet Switch: Amazon.co.uk: Computers & Accessories
UBIQUITI Unifi Switch US-48-500W - The source for WiFi products at best prices in UK - wifi-stock.co.uk
NETGEAR PoE Switch 24 Port (GS348PP) 48 Port Gigabit Ethernet Switch with 24 x PoE+ 380W, Desktop/Rackmount, Sturdy Metal : Amazon.co.uk: Computers & Accessories
S5500-48T6SP-R, 48-Port Gigabit Ethernet L3 PoE+ Switch, 48 x PoE+ Ports @740W, with 6 x 10Gb SFP+, Support Stacking - FS.com