Broadband keeps dropping not at guaranteed speed

[Tmerc]

Hi, I am having very slow speeds to my broadband it's worse in the evening now its 19mbs (I'm guaranteed 30) but it gets to 7mbs and then just drops out. I work from home so really important I get this resolved. Can you please help. Thank you Tracy

[JimM1]

@Tmerc Thats a do it yourself, and nothing found then you need to call sky, start with the link below!

Try running the line test here to see if any faults are found:
https://www.sky.com/help/articles/broadband-diagnostic-start