By Jess Jones Australian property group REA has upped its takeover bid for Rightmove to £6.1bn, saying it is “genuinely disappointed” with the lack of engagement from the company so far. Earlier this month, Rightmove snubbed a £5.6bn offer from Rupert Murdoch-owned REA, saying it was “wholly opportunistic” and undervalued the British property portal. The indicative offer was at 305p a share in cash, a premium of 26 per cent to Rightmove’s share price of 556p on 30 August 2024. On Monday, however, REA said it had increased its bid by 9.2 per cent to 341p in cash, a 39 per cent premium to Rightm…