The UK e-commerce market is Europe’s largest and is set to reach £90 bn before 2020 (up from £60 bn in 2015). But while e-commerce grows, the preferred consumer payment mechanisms are changing. The Payment Services Directive 2 ( PSD2 ) will come into force in the UK (and the wider EU) within two years and will have a profound effect on retail and commercial banking . While new payment categories like PISP ( Payment Initiation Service Provider ) and AISP (Account Information Service Provider) will transform how consumers interact with their banks and third parties, they also hold the potential to transform e-commerce. A catalyst for alternative payment methods Today, credit and debit cards in particular are the preferred consumer payment method in the UK, with card spending comprising 63% of all e-commerce payments. However, according to WorldPay, alternative payment methods will see their overall share of transactions grow from 37% to 50% by 2019. The implementation of