Bad was released on Tuesday, 1st September 1987. One of the first times (at that point) where a new release did not come out on a Monday in the UK. True, it was a Bank Holiday week, but the bigger stores in London would still stock most things that day if they were open. I think it was kept back to tie in with the US release day of a Tuesday. I certainly tried to nab a copy on the Monday, without success. Bad is also quite unique in that it actually had a big hit with one of the CD-only bonus songs! So if you had the tape or LP, you only had 8 of the singles.
Hey, less of the Straits bashing, haha. They haven't left as much of a legacy for various reasons. No musical in the West End and/or Film about them, nobody in the band died, the press hated them (big part of it, this), and as mentioned Mark Knopfler actively sabotaged their success post-Brothers In Arms because he didn't like the demands and lifestyle of unit-shifting stadium rockstars. He wanted to do as he pleased, away from the spotlight of the (then) biggest band in the world. On Every Street was as far as he was prepared to go in terms of compromise. Dire Straits could have sold millions of anything if they'd made another album between 1987 and 1989. I expect they were offered a lot of money to do just that. But he walked away from it, which takes some guts. He did what he felt was right. A lot of his 90s and 00s work is sublime.