Crucial new replacement models for the Range Rover and Range Rover Sport could be agreed within 18 months of this week’s takeover of Land Rover by Tata, it has been revealed.Unions are to press their new Indian bosses for agreement on a vital product overhaul that could safeguard the 6000 jobs at Lode Lane for many years to come, according to plant convenor Bob Nason.Mr Nason told the Daily Mail, "Ford taught us the hard way that just because they have been building cars here for years, it does not mean that they will be built here in the future. The Freelander went to Halewood."We want to make sure that we put ourselves in the best position to attract future investment here. There are no guarantees in this world at the moment. We have got a business plan that takes us through to 2012 and I believe that there will be an announcement in terms of the Range Rover and the Range Rover Sport in the next 18 months."I would imagine that those products would be up and running by 2012 onwards and we have got to safeguard the 6000 people at this plant. Tata have indicated that by 2012, all being well, the number of people working at the plant will be increased."