1. [Pluto TV](https://pluto.tv): Pluto TV is a free streaming service available in the UK that offers over 40 live TV channels and a library of on-demand content. Dance Moms is available on the "LifeTime UK" channel on Pluto TV.
2. [My5](https://www.my5.tv): My5 is the on-demand streaming service for Channel 5, which airs Dance Moms in the UK. You can watch episodes of Dance Moms for free on My5, but you will need to create an account and verify your UK postcode.
3. [UKTV Play](https://uktvplay.co.uk): UKTV Play is the on-demand streaming service for the UKTV network, which also airs Dance Moms in the UK. You can watch episodes of Dance Moms for free on UKTV Play, but you will need to create an account and verify your UK postcode.
4. [Prime Video](https://www.primevideo.com): Prime Video offers the first few seasons of Dance Moms for free with advertisements. However, you will need to have a Prime Video account to access the free content.
Please note that the availability of Dance Moms on these streaming services may change over time, so it's always a good idea to double-check their websites or apps to confirm.