New mat for Rega P6?

After you have examined all the various mat choices, take a look at the upgrades from Groovetracer. A friend has done the reference sub-platter upgrade and just recently got the Delrin platter for a current P3. The sub-platter, the Herbie's mat, better belt, better support stand all were incremental changes. The Delrin platter is a complete game changer (no mat is used with the Delrin platter). The tonal balance was shifted from a very upper midrange forward presentation to a more balanced sound with a massive increase in detail. You will perceive much more information than you thought could exist on late 50's and 1960's jazz recordings. It's amazing what they were able to capture on those tapes with the technology of the era. That same friend points out that the way microphones were made back then may be reason. They had huge diaphragms compared to todays products.

We sort of got off topic because the actual issue was static, which the OP presumed came from the felt mat. Maybe so, but a Herbies mat or Delrin platter may not cure that issue. That’s why I recommended Gruv Glide if the static was that bad. Anyway…

@chayro nevertheless, a change in the mat will mean a change in sound. I've never used Gruv Glide but I'm assuming that it won't change the sound so point taken.

I use a Herbie’s mat on my Planar 8. It can be ordered in the same thickness (2mm) as the stock Rega felt mat. I perceive zero downside in terms of sonic performance.

I neglected to address the primary reason/issue for your post. Static reduced significantly. Unscientific, but estimate 75-80% less.