Look, we have no national ID card VWM, as you say. The casinos ask for PHOTO ID of which most of us have two. These are of course DL and passport. Now, the first thing most 17 year-olds do is get their driving licence. This will have a photo. It matters not whether they pass a test or not. When since has there been a difference to casinos whether the DL is provisional or has added vehicle categories because you've passed a test? I never realized being able to drive was a necessity to gamble online.
When I was 18 almost everybody I knew had been abroad (requiring a passport) AND had got their provisional DL. Now, excuse me if I'm being judgmental, but if a young adult has not travelled further than their local MacDonalds or shown an interest in vehicular mobility for both social and employment purposes, then really they have better things to achieve than 3 scatters in their lives.
It is not unreasonable for a casino to request a view of either document. It is simple to upload. It's no good bellyaching AFTER you've gambled that you have neither. Now I realize this sometimes occurs because the 1-in-10,000 who have neither photo ID may have gambled and w/d at a site that paid them without asking because they w/d less than a certain amount, and then found they couldn't w/d at the next because that site asked for photo ID and the player assumed (because they never read the T&C's) that it would be the same as their last casino.
This explains why I stated 'idiot proofing bonus spin values' was bad, and I was frowned on by the knee-jerk brigade before they realized what I was trying to say - you will get the SAME scenario as described in the paragraph above, whereby because the player wasn't asked at casino A, they ASSUME the same will apply at casino B. Then they come on here thinking they've been treated unfairly.
IF the worst comes to the worst, get the ID after you win. Instead of bleating on here, go to the post office, go in the photo booth, get you passport application or DL application in next day. They even have an 'idiots counter' in main post offices whereby for a fee of a few pounds, the clerk will fill all the forms in and check them for you - all you do is sling her the payment and the photo and your birth certificate. The passport office and DVLA are quite expedient when it comes to sending the DL or PP back to you. You usually have them in 3-5 days.
So, if you act fast, as soon as you win and they ask for ID, you could have it done and scanned within 7 days, and be paid a 1-4 days after that. A total wait of 7-11 days from being asked for ID. Not bad, when you consider even verified US players routinely wait 10-14 days for cashouts.
So quit moaning, just get the ID (thereafter you're fine for at least 10 years at any casino) and get used to providing it. Any proper casino going by the rules and just general security will ask for it, now, tomorrow and next year.......