The latest top of the line Series 9000 Prestige shaver SP9863/14 (not to be confused with older Series 9000 models). 2 year guarantee, and Philips have a 30 day returns policy if you are dissatisfied for any reason. I have used a few Philips wet shavers in the last 12 years, and this is the best one yet. No problem with 4 day stubble, even dry.
It is currently reduced to £300 in the Philips sale which ends tomorrow evening. And you can get a further 15% off on top of this by subscribing to their newsletter, bringing the price down to £255, which is the cheapest I've ever seen this. It's £399 on Amazon.
To get the extra 15% off, go to the main philips.co.uk/
website (clear cookies if you have been before), then at the top right you should see a person icon with a red number 1 message indicator. Click on that, and click on "Sign up and get 15% off in the Philips online shop!*"
The email with the discount code took about 45 minutes to arrive. Note the discount seems to work with anything in the sale except the clearance section.