Here's a quick look back at what's happened today:

• Prime Minister David Cameron said he has accepted an offer to take part in one seven-way TV debate at the beginning of April

• Labour leader Ed Miliband again challenged Mr Cameron to agree to a head-to-head debate

• Two prominent Labour MPs said police and intelligence officers who give evidence on an alleged Westminster paedophile ring must be protected from prosecution

• Home Secretary Theresa May said she would not expect officers to be charged if they disclosed such information

• Former Conservative cabinet minister Ken Clarke said the government's Fixed Term Parliaments Act was a "mistake"

• Reports said the Conservatives have drawn up plans to allow some parents to leave homes worth up to £1m to their children without paying inheritance tax

That's all from Politics Live for tonight. We're back for a big day tomorrow, with live Budget coverage getting under way at 06:00 GMT. See you then.

Tomorrow is Budget Day and we'll have comprehensive coverage across the BBC. You can keep up with the latest:

• Online: Full live coverage in text, video, at-a-glance and what it means to you

• On TV: A BBC Two special from 11.30am to 3.30pm Rolling coverage on the BBC News Channel

• On radio: A Radio 4 special from 12.15pm to 2pm. 5Live special from 11.55am to 4pm

• On Twitter: BBC correspondents tweeting #Budget2015

BBC News Channel

On the paper review, John Rentoul, from the Independent, says the chancellor has got to "look out for" appearing to offer a pre-election bribe in tomorrow's Budget. Former Tory MP Angela Knight says she expects a surprise of some sort.

London Evening Standard
Newspaper

In Sarah Sands' interview for the Evening Standard, Prime Minister David Cameron reveals what keeps him sane, external. In answer to that question he replies: "Mrs Cameron. She is my light and dark, my support, my everything. She is very good at making you focus, that the work is important but so is being a good dad. This job is very stressful and there is a lot of pressure on you and your family but she is so well organised and strong she manages to construct the family round it,"

tweets, external: Budget 2015: George Osborne to announce tidal power scheme in Swansea, external

The BBC has learned the chancellor will have an extra £6bn a year to help reduce spending cuts and the national debt in Wednesday's Budget because of low inflation. It means that austerity might be less severe than previously thought under a future Conservative government. Here's Robert Peston's report.

BBC Newsnight
BBC Two, 22:30

Ken Macdonald - the former Director of Public Prosecutions (DPP) - tells Newsnight he can't imagine any situation where he would prosecute someone who came forward to whistle blow over child abuse under the Official Secrets Act. He says Theresa May was right to say what she did earlier on immunity (the home secretary did not rule out prosecutions, but said she wouldn't expect them to happen) - that's a decision for the attorney general and the DPP.

He also says the act is sometimes "waved around" to "keep people quiet when they shouldn't keep quiet". The act is not there to stop scandals being brought to public attention, he says.

Tweets, external: @AnnPettifor: "it would be historic if Osborne was re-elected on the back of 7 years of falling income". #budget2015

tweets, external: YouGov/Sun poll - Labour two ahead & polling highest score this year. Ukip poll their lowest: CON 34%, LAB 36%, LD 7%, UKIP 12%, GRN 6%

tweets, external: Claims that CCTV of Cyril Smith was used in a training vid that taught officers how pedophiles effectively groomed boys, says @SimonDanczuk

Image source, PA

The new £1 coin was designed by 15-year-old David Pearce, whose winning design was picked from more than 6,000 entries and will be put on to the new coin in 2017. David, from Walsall, received the good news from the chancellor, who rang up to tell him he had won.

George Osborne, who welcomed David and other young entrants to Downing Street to celebrate their success, said David's design would be "recognised by millions in the years ahead". He said: "Designing the new £1 coin was a brilliant opportunity to leave a lasting legacy on what will be the most secure coin in circulation anywhere."

BBC Newsnight
BBC Two, 22:30

What marks would you give the chancellor out of ten for his record in office, Evan Davis asks the panel. Ann Pettifor says two, but John Moutlon would give him eight.

tweets, external: To all those asking we have invited David Cameron to come on next week's show... #BBCFreeSpeech #fingerscrossed

BBC Newsnight
BBC Two, 22:30

Image source, Newsnight

Talking about George Osborne, John Moutlon from Better Capital says the chancellor has failed to win the austerity argument - but that he hasn't lost it either.

Author Ann Pettifor says Mr Osborne's big achievement was political - moving the debate onto public finances. All the political parties have been talking his talk, she adds.

BBC Newsnight
BBC Two, 22:30

Allegra Stratton says the reports are quite quiet tonight on the Budget front. She says the Lib Dems giving their own alternative budget on Thursday shows that the parties want to "differentiate" ahead of the election. This week needs to be a launch pad for the election for both the Tories and Lib Dems, Newsnight's political editor adds. Duncan Weldon, Newsnight's economic correspondent, says the Chancellor has quite a lot to play with tomorrow.