19,134 adults aged eighteen and over, from nineteen European countries, were interviewed between 26th and 30th January 2021. At least 1,000 respondents from each market participated in the research.
Interviews were conducted in the respondents' native languages via an online questionnaire.
All respondents were members of an online panel, and were double opted-in. They were recruited via social media, advertisements and affiliates.
The research was conducted by FlyResearch Limited. They are a UK-based online research agency founded in 2004. FlyResearch are members of the Market Research Society.