By Chris Dorrell Politicians will need to take into account the “reality of the market” ahead of a general election expected later this year, the outgoing head of the UK’s Debt Management Office cautioned. In an interview with the Financial Times, Robert Stheeman warned that a borrowing binge would risk a market backlash. “Don’t kid yourself in thinking that you can develop policy in a vacuum without taking the market into account,” Stheeman said Shteeman was head of the debt issuing body during Liz Truss’s brief tenure as Prime Minister, when £45bn in unfunded tax cuts sent the bond market in…