This week’s top five most important business stories from Business Matters.

1. Preston Street in Brighton looks set for big changes with the i360 construction underway – but they can’t happen quickly enough for frustrated traders. Restaurateurs are desperate for the street to be pedestrianised to improve its pulling power. The council’s slow progress risks presenting a shabby appearance to viso9tros, they warn.

2. A vote of confidence in the area with global medical company Elekta unveiling plans for its Centre of Excellence near Gatwick. Find out what the multimillion-pound investment means

3. More health-related news after health communications firm Pegasus won big at the “Oscars of PR”. Find out what slime had to do with their PR Week triumph 

4. With limited resources and spending cuts, how can public policy be efficiently implemented with the greatest impact? These are some of the core answers data consultancy OCSI is facing up to.

5. With some of the most richest business leaders in the world singing the praises of flexible working week, should the four-day week come to Sussex? This is the question we put to some employment specialists and business executives.