How the 2013 F1 grid shapes up

The 22-piece puzzle that is the 2013 F1 grid is finally complete...

Williams
Confirmed: Pastor Maldonado and Valtteri Bottas
Bottas' promotion comes after a series of strong showings during his Friday Practice appearances this season. On each occasion he took the place of Bruno Senna and now that move has been made permanent. Pastor Maldonado's second season was about as inconsistent as they come - the vertiginous high of Barcelona tempered by a string of petty incidents, retirements and visits to the stewards. Williams will continue to polish this rough diamond and doubtless the sponsor's millions will help them. Toro Rosso
Confirmed: Daniel Ricciardo and Jean-Eric Vergne
After a very average start, Vergne's vulnerability has softened as the season has progressed, thanks in the main to three eighth-place finishes which place the Frenchman three points ahead of his team-mate in the standings. Ricciardo has been more consistent - not to mention far superior in qualifying - and it's with little surprise that both have been given another year in which to prove themselves as a potential successor to Vettel or (more likely) Webber. Force India
Confirmed: Paul di Resta and Adrian Sutil
The team had made no secret of their wish to retain their 2012 line-up for 2013, but Nico Hulkenberg's long-predicted move to Sauber was confirmed with a month of the campaign still remaining. The under-contract Paul di Resta was sure to stay on, but who would partner him? The question remained unanswered until two weeks before the racing season began when, following what was billed as an effective shootout for the drive at the first Barcelona test, the team opted to rehire Adrian Sutil at the expense of 2012 third driver Jules Bianchi. The belated decision means the team therefore revert to the same driver line-up they had in their most successful season of 2011. Caterham
Confirmed: Charles Pic and Giedo van der Garde
After a solid debut year at the top level with Marussia, Frenchman Pic will jump ship from one still point-less 2010 newcomer to another, ensuring at least one of Caterham's more experienced current line-up will be making way. The team's line-up will be completed by Dutchman Giedo van der Garde, the 27-year-old appointed the week before the first test of the winter at Jerez after a year spent racing for Caterham in the GP2 Series. Marussia
Confirmed: Jules Bianchi and Max Chilton
Timo Glock had appeared set for a fourth season with the team until they announced in January that he was departing "by mutual consent". The team, who missed out on a financial boost when Caterham beat them to tenth place in the Constructors' Championship in Brazil, readily admitted that "tough economic conditions" were to blame and soon hired Brazilian GP2 race winner Luiz Razia to partner another F1 rookie in the form of the already confirmed Max Chilton. However, the failure of Razia's sponsor to come through with the promised funds meant the musical chairs restarted, with the man only passed over further up the paddock by Force India the previous day, the Ferrari-backed Jules Bianchi, eventually named as Chilton's new team-mate after Razia's contract was terminated. Pete Gill