@Annabel0123 first think to check is the servicecchecker in the My Sky app as that routinely tests speeds to your hub and should offer help,if those have dropped by 50%.
If thecspeed the checker gives looks fine it is likelybto becan issue in your home. As a start reboot the hub by removing the power forca few seconds as thst will cause it to find tge least congested wifi channel as your issue coukd be interference. While near the hub make surecit is out in the open on a surface well away from othe equipment.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
