Also long ago when it was all National Bus Company, the Wanderbus ticket existed. Essentially the All Line Rover but for buses. Sounds amazing. Even had a national bus map, sadly couldn't imagine that now.
https://junction-ten.co.uk/2016/04/16/the-national-wanderbus-ticket/ It would've been awesome to go back and experience this.
Before you get all misty-eyed about that, just a few things...it wasn't all the National Bus Company. It was only in the Midlands and South. And, of course, you could use it on London Country but not London Transport. In fact, the only non-NBC services that you could use it on were where there were joint ticketing/pooling agreements such as in Brighton.
When it was replaced by the Explorer ticket, which
was the entire NBC, then it wasn't valid before 0900 on a weekday. There were also other vagaries so you could buy an NBC Explorer and use it on United and Northern General services but not wholly within Tyne and Wear... that was another ticket!
The joy of NECA (North East Combined Authority) and TVCA (Tees Valley Combined Authority) being separate. It's not an issue for most of the north east, but the boundaries at Darlington and Hartlepool are an issue. Places like Newton Aycliffe very much point towards Darlington but, as they're in separate areas, there is no sensible cross-border multi-operator ticket.
The thing is that you can buy an all operator TNE (or Co Durham) day ticket and that is valid from Newton Aycliffe to Darlington. However, a Tees Valley one will only take you as far as Coatham Mundeville from Darlington.
At least there's the North East Explorer still, although as most independents no longer accept the ticket its utility isn't anywhere near as good as it once was. I was hopeful that Proctors and East Yorkshire (at least in and around Scarborough) would join the scheme when they were bought out by Go-Ahead, but sadly not.
As I said above, when I first got Explorers (when the world was black, white and poppy red), you could travel anywhere on an NBC bus so I used them to get to Berwick, Whitehaven, and as far as Hull and Leeds but not before 0900 on a weekday nor wholly within Tyne & Wear; I dutifully used to record my trips out and whilst I could get to Sunderland and Newcastle, the flesh pots of South Shields and Tynemouth are absent from my travels! Also, they weren't valid on TWPTE/Busways even to Northumberland, Cleveland Transit or Hartlepool Corpy (or Darlington for that matter) nor OK, TMS or most of the other firms.
For many years, the Explorer was United, Northern and Northumbria plus Weardale, later adding the Metro and Ferry. Only when Stagey bought Busways, Transit and Hartlepool, Go Ahead bought OK, and NEB (was United, now Arriva) bought TMS and Eden did it become the comprehensive NE bus ticket it is now. I know Travelsure later joined the scheme, and there was an unadvertised rule that tendered services in Northumberland would accept them. I never established how true it was but I did travel on a Glen Valley bus with an Explorer ticket once.
Now, if having got the indies to accept the TNE tickets, they could get them to accept Explorer NE as well...