I was the same a couple months ago :) - I didn't have the tracking but was monitoring my postie's movements like a hawk haha. But just to reassure you, every package I've ordered (whether first class, tracked or special next day), has arrived safe and well and promptly. I'd actually say that the simple 1st class (usually free) deliveries have been just as good, usually 1 day, sometimes 2. So some props to Royal Mail! Just always leave a little leeway for delays, just in case, so you don't run out. Takes a bit of adjustment compared to the old school dealers ;)
Welcome to LB and welcome back to the UK bro! Happy smoking. I'm sure it'll arrive later today.
And can I just recommend British Bulldog, Druids Magic, Sassy Buds (all amazing growers, all lovely people with great service and comms and stunning bud - trying BB's bud for the first time shortly! Other two I've already sampled).
BB has something coming soon (next week or two I think), but the others don't have any bud right now - so otherwise can highly recommend Green Cat, who has been lovely to deal with. Delivery can take 3-4 days sometimes (but always gets there, it's just a bit confusing cos he says Tracked 24). Trust me it's worth the wait. And just FYI he's pretty slow to respond to messages, I think cos he's a one man band and it's hard to keep up. From everything I've heard, he always resolves any issues though.
Anyway, the Cat's weed is always really, really good (and very well priced).
I've also had some brilliant Purple Kush from Your Natural Medicine (fast service). And Riley_packs went above and beyond for my order (plus great comms and rapid delivery) - and the one strain I've tried of theirs (Divine Jelly) is fire. Can't wait to try more. It's more expensive but top quality.
I noticed you were looking for some White Widow, try the "keyword" search in items (in case you haven't used it yet), there are a couple of options for White Widow (I've just never used the vendors). Also the Cat has Kamikaze, which is a White Window, Jack Herer cross.
Just some unsolicited advice, hope it's useful :)