I think the October 30th date could be correct; and delays may refer to the US issue (4th January 1971).
The 'delay' in charting to 16th January publication date (surveys a week or more earlier) possibly due to competing with the 'Elton John' album which - according to The Official Charts Company - only charted for 2 weeks on release in May 1970 (nos 48, then 60). It then returned to the chart from first week of Feb 70 to July 70, only reaching it's no5 peak the first week of March; then just managed 5 weeks in the top ten.
'Tumbleweed ....' begins its 20 week chart run at no41 before zooming into the top ten at no9 both album now competing with - and encouraged by the 'Your Song' single. This album gets a better 11 weeks in the top ten (peak no2 for 3 weeks), it drops from the chart in late June however. That is two or three weeks before 'Elton John' drops off!!
The earlier album being the one with the hit single..
While researching Genesis release dates this year I came across a reference to the release of Tumbleweed Connection having to be rescheduled due to issues with the elaborate sleeve/booklet. I believe it was intended to be released on 13 November (possibly after being scheduled for the date given on here and on Wikipedia) but was delayed to an as yet unconfirmed date. The album entered the UK charts on 16 Jan 1971 which suggests a release sometime in December in fact. I also came across a copy of a music paper that was dated 26 December 1970 (not sure which paper but not Sounds - possibly Disc and Music Echo) and this included an advert for this album saying it was 'available now' and I wonder therefore if this also suggests a December release. (I realise adverts can appear weeks after release for a number of reasons). I've got a few music papers from December 1970 so will see if I can find anything else pointing to this delay. But the October 30 date is certainly wrong.
the labels I found are a bit different, with "Made in England", A-3 and B-4 on the runout grooves and on translucent purple vinyl. Sadly the vinyl jumps badly :(
This was the first album that I had on all four formats at the same time - LP, CD, Cassette & 8 track. I've since dumped all my cassettes (Beatles apart) and 8 track cartridges since I thought they would never be of any use or interest to anyone. A few short years ago nobody wanted them, including charity shops. They all ended up in the local recycling centre. A lot of the cassettes were home made copies of LPs, but many of them were bought originals.
I still think this was Elton John's best album.