ords

Maybe Google the tyre spec you're using now for noise & efficiency & compare it with the one's you had on before.

Yes, but now you're using budget tyres. That's why it's possibly a reason for the poor fuel consumption. Have you checked the pressures since they were fitted?

The OP has said he's getting 20-30 miles less than he used to. I can't see a blocked filter making that much difference.

So why bother to change the filter if it's going to make the mpg worse?

Search for "struts" in this forum. Quite a few threads

Just a general observation. Not aimed at any paricular poster.

I'm sure e-Roottoot will appreciate the thanks. His time was not wasted as you took his advice. I find increasingly that we give advice & suggestions & then hear nothing. Not even a "like". If people bothered to use the search facility they would find answers to many of their queries, as the same problems keep coming up year after year. Rant over

3rd post down mentions your problem

Have you had the car from new? Has it always been like that?

See this thread

This may help

Seems to be a repeat of an earlier thread.

if it's an Amundsen unit you have to use an official Skoda SD card. An ordinary SD card will not work. Make sure it's there If it's a Columbus unit no SD card required

A clip of the noise would be helpful. Does it sound like this?

Skoda quote about £600 for the job. I'm getting mine done next week for £380 by an indie.

If possible convert the video to mp3 format & post that. The file size will be much smaller

https://www.briskoda.net/forums/topic/438893-soaked-drivers-footwellwhere-to-go-next/?tab=comments#comment-4936469

Many threads on this subject. Just do some searching in this forum. Biggest culprit seems to be the pano roof drains.