However, there is a trade-off between increasing the price through market interventions and doing this in a way that maintains the long-term credibility of the trading scheme. Indeed, the long-term credibility of the carbon price after the current phase ending in 2020 will be crucial for long-lived, low-carbon equipment such as nuclear power plants, CCS or off shore wind-farms. The floor price will start in 2013 at GBP 16 per tonne and will reach GBP 30 per tonne in 2020.