I use IE on my computer. Plusnet is my Broadband ISP.
Would be surprised if IE was at fault, simply due to so many people using it - there would be loads of us on here with the problem.
Does seem strange and I can think of no other changes I've made on my PC in recent weeks. Only been a problem in the last few days.
Odd that JX Babe has similar problems to me, at a similar time to me.
Si