Inputs on European Utilities - Power Exchanges

We need detailed responses on the following questions which discuss the evolution of power exchanges in Europe. We need details of the following questions for both UK and Germany markets 1. How is whole-sale power procurement done in UK and Germany. We specifically wish to understand the following points: a. Are the contracts structured on a long term basis or on a day-ahead basis b. What is the split between the above two modes (i.e. between long term and day-ahead) c. What are the factors which drive the share between the two modes d. How has the share between long term and day ahead moved over time. What are the drivers of this change 2. On what platform are these contracts executed (exchange or OTC or any other) 3. Which platform dominates which kind of contracts (what is split on an overall basis) 4. How has the share of platform evolved over the last 10-15 years (specifically - have power exchanges gained more share. What are the reasons behind this shift) 5. Has increasing share of renewables been a key reason behind the shift