Under £300

Strong MESHTRI1200UK AC1200 Whole Home Wi-Fi Mesh System (3 Pack) ACC36

Strong REPEATER AX1800UK AX1800 WI-FI Range Extender/Repeater ACC34

Strong POWERL600DUOMINIUK AV600 Mini Powerline Kit (2 Pack) ACC33

INTERNAL PCI EXPRESS FAST WIRELESS CARD Dual Band ACC04

WiFi USB 11AC Dual Band Adaptor 600MB/s 2.4/5GHz ACC11

Internal WiFi PCI Express Wireless Card ACC01