Exxonmobil, the global oil company, has put a package of its stakes in Southern North Sea oil and gas fields on the market for over £200m. The package includes stakes in the Lancelot, Thames and Hewett area fields and the Hewett Bacton Gas Terminal. The US-based company has stressed that it will stay committed to its remaining operations in the UK. Potential buyers for the assets include Tullow Oil and utility companies RWE and E.On.