Thanks everyone for your very useful advice. I've invested in longer cables and relocated my router to a more central area in my apartment which has improved the signal and turned off the TP Link...

@Tony Thank you for the advice. I will try this and let you know if I have any issues. Cheers,

Recently I've started to get a 'weak security' alert when I connect my iPad to the internet via my network extender but it doesn't appear when I'm closer to my router. Is this a TP LInk issue or iPad...