OK, here's what I've got for B:
BBM Possibly not the place to discuss all their previous history, but worth mentioning IMO that they're a 2/3 reunion of Cream - that's how I remember them beign promoted at the time. Gary Moore died 6-Feb-2011
B-Crew X-ref to Erick Morillo's other projects?
BON Stands for Band Ohne Namen (German for Band With No Name)
BWO Supposedly stands for Bodies Without Organs
B*Witched X-ref to other Lynch sisters in Buffalo G and FAB
Mark B Is not a rapper, just a producer
Babybird Was initially a solo project by Stephen Jones, who released I think five albums in a year before recruiting the band who play on all the hits. He now uses the name solo again.
Bachman-Turner Overdrive X-ref to Guess Who and Tal Bachman
Backbeat Band Greg Dulli was (and now is again) the leader of Afghan Whigs; Dave Pirner is the lead singer of Soul Asylum
As the film is about the Beatles, both their hits were covers of songs performed (but not written) by the Beatles.
Bad News X-ref to Nigel Planer's hit as neil?
Angelo Badalamenti x-ref to Booth & The Bad Angel
Badfinger Originally founded as The Iveys
Pete Ham 27-Apr-47 - 23-Apr-75
Tom Evans 5-June-47 - 23-November-83
Joan Baez Correct song title is 'The Night They Drove Old Dixie Down'
Arthur Baker 'Confusion' in 2002 is a remix of a New Order single which originally involved him but he wasn't credited that time. Not sure if that's worth noting?
Steve Balsamo Was(?) also a member of The Storeys
Baltimora Jimmy McShane 23-May-57 - 28-Mar-95
Afrika Bambaataa Was also a member of Time Zone
Bananarama Jacquie O'Sullivan. Siobhan Fahey was formerly married to Dave Stewart (of Tourists/Eurythmics etc).
Lananeeneenoonoo were Dawn French, Jennifer Saunders [both charted as Absolutely Fabulous, Saunders is married to Ade Edmondson of Bad News], Kathy Burke [also charted as part of Precocious Brats featuring Kevin & Perry]
Band Aid II I can see why you've done it, but it looks odd to have Band Aid 20 listed before Band Aid II IMO.
Bandaged I know Anglo-Irish is the standard term, but it looks slightly odd as Aled Jones is of course Welsh
Pato Banton 'Baby Come Back' has a partial credit to Ali & Robin Campbell [both members of UB40 at the time]
JJ Barrie His hit features uncredited vocalist Vicki Brown (wife of Joe, mother of Sam) should you choose to include them.
Basement Jaxx Felix Buxton
Beach Boys I could write pages about their comings and goings and other trivia, but for the sake of brevity I'll keep to a few points:
Thanks for including Fataar and Chapman, people tend to write them out of history. FYI, they're both South African and Fataar also charted as a member of the Rutles.
Dennis Wilson 4-Dec-44 - 28-Dec-83
Carl Wilson 21-Dec-46 - 6-Feb-98
I think they all attempted solo careers, only Bruce and Brian have made the UK singles chart. Dennis made a belated album chart appearance.
Brian's daughters (Wendy & Carnie Wilson) were/are members of Wilson Phillips
Beady Eye Pedantically, Chris Sharrock wasn't an official member of Oasis but toured and recorded with them in the later years of their existence. He, Andy Bell and Gem were all members of other acts pre-Oasis, is it worth referencing them all everywhere?
Beck Usually known as Beck Hansen {his mother's surname} though all releases are credited to Beck (or Beck! in 1996-7)
Bee Gees Maurice Gibb 22 Dec 49 - 12 Jan 03 (he was also married to Lulu for some time but they divorced)
Robin Gibb is also deceased, I can't remember the date offhand.
George Benson His first hit was credited to George "Bad" Benson
Bentley Rhythm Ace Richard Marsh was previously a member of Pop Will Eat Itself
The Bible Neil MacColl is the son of Ewan MacColl and Peggy Seeger, the half-brother of the late Kirsty MacColl and the father of Jamie MacColl from Bombay Bicycle Club
Bill Black Best known as a backing musician for Elvis Presley on his early recordings
Blancmange Their first hit title seems to have been caught by the spam filter! Not sure if there's anything to be done about that.
Mel Blatt Is also credited as part of Outsidaz featuring Mel Blatt and Rah Diggah on a 2002 hit.
Blind Melon Shannon Hoon 29-Sep-67 - 21 Oct 95
Blow Monkeys Robert Howard (aka Dr Robert) also had a duet hit with Kym Mayzelle, which appeared on a Blow Monkeys album so should be cross-referenced.
The Blues Band Paul Jones and Tom McGuinnes were ex-Manfred Mann. McGuinness and Flint also recorded as McGuinnes Flint (must have taken them ages to think of that name!)
Bluetones Their second hit of 2000 has a subtitle: 'Autophilia (Or How I Learned To Stop Worrying And Love My Car)'
Bo Selecta X-ref to Avid Merrion's hit with Davina McCall & Patsy Kensit, and to Leigh Francis hit as Keith Lemon?
Bombalurina Dawn Andrews is married to Gary Barlow
Jon Bon Jovi Correct title of his 1997 hit is 'Midnight In Chelsea'
Bonnie "Prince" Billy Name is usually written in inverted commas. He has released albums under many other pseudonyms
Bonzo Dog Band Neil Innes also charted as a member of the Rutles, is also known as a TV presenter, comedian, Monty Python collaborator, recorded solo
Viv Stanshall also recorded solo, died 5 Mar 1995. Other members credited as Roger Ruskin Spear, "Legs" Larry Smith
Boo Radleys Correct title of 1995 hit is 'From the Bench at Belvidere'
Booker T & The MGs Al jackson died 1 Oct 1975, Donald "Duck" Dunn died more recently.
Clint Boon Experience Full title of their last hit is 'Do What You Do (Earworm Song)'
Bourgie Bourgie Paul Quinn later recorded solo and had a Top 75 single in duet with Edwyn Collins (he's not the same Paul Quinn who was in the Soup Dragons and Teenage Fanclub though)
Bootsy's Rubber Band Were formed around Bootsy Collins - I don't think George Clinton was involved?
Bow Wow Wow Dave Barbarossa was later a member of Republica
Box Tops Alex Chilton later formed the very influential group Big Star and recorded solo. He died a couple of years ago.
Boy George Was also a member of E-Zee Posse
Boyzone As far as I can tell, neither Shane nor Keith ever had a solo hit, only their duet
Brad Stone Gossard is better known as a member of Pearl Jam. The act was originally called Shame until a musician called Brad Wilson claimed the rights to that name - hence the change.
Brakes Eamon was also a member of British Sea Power. The act are known as Brakesbrakesbrakes in the US.
Brandy is the sister of Ray J.
Braxtons Toni Braxton had been a member but didn't seem to be there at the time of their UK hits.
Breaks Co-Op Andy Lovegrove is British and the act were UK-based at the time of their hit.
Breeders X-ref to Kim Deal as a member of Pixies and Tanya Donnelly in Belly and solo.
Bright Eyes 'Easy/Lucky/Free' is the title of one song, not sure if that can be made clearer?
Bette Bright Is married to Suggs
Brit Pack Were cast members from Boyband The Musical.
Garth Brooks His last hit was credited in some places as "Garth Brooks as Chris Gaines" (it was a character he played in a film)
Brother Beyond David White is the brother of Eg [Francis] White, one of the most successful songwriter-producers of this century and a less popular solo artist.
Emma Bunton is the long-term partner of Jade Jones, who had hits as a member of Damage
Eric Burdon Also had hit albums in collaboration with War
Bush Dave Parsons was an ex-member of Transvision Vamp.
Buzzcocks Tracks on Spiral Scratch EP: Breakdown; Time's Up; Boredom; Friends Of Mine
This EP was originally released in 1977, and features Howard Devoto who left before their other hits but was also a member of Magazine and Luxuria as well as recording solo. He missed the Top 40 in all those forms.
Whew, I feel a bit of a pedant now. Apologies if I've included anything corrected since I made my notes.