You can buy Sky microfilters through online marketplaces like eBay UK and Amazon UK . While Sky no longer provides these filters directly to most customers, they are widely available for a few pounds at local hardware stores.
ADSL Filter Microfilter for Broadband/Phone, BT Plug ... - Amazon UK buy sky microfilters
You only need a microfilter if you have a (one single port for both phone and internet). You can buy Sky microfilters through online marketplaces
You must plug a filter into every phone socket in your home that is currently in use. 🚫 When You Do NOT Need One buy sky microfilters