European equity markets were set for a largely unchanged open on Monday as investors tracked evolving developments in US-Iran peace negotiations. Reports suggested that Washington and Tehran had agreed on a roadmap toward a final agreement within 60 days, helping ease market concerns after both sides recently exchanged fresh threats over the conflict in Lebanon. In the UK, investors are also assessing speculation that Prime Minister Keir Starmer could announce plans to relinquish power as early as today after Greater Manchester Mayor Andy Burnham was elected to parliament last week and emerged as a potential challenger. Meanwhile, the European calendar is light, with no major economic data releases or corporate earnings reports due. In premarket trading, Euro Stoxx 50 and Stoxx 600 futures were little changed, hovering around flat to slightly lower levels.