Members drifting from their group: we split the last 36 roll-call votes into an earlier and a later half and compare each member's loyalty to their group's majority across the two. How this is measured.
Not enough roll-call data yet.
Defection Watch appears once enough per-MEP positions are ingested across a wide enough window of recent votes to compare an earlier and a later half.
Loyalty = 1 − the rate of voting against your group's for/against majority. The delta is later-half loyalty minus earlier-half loyalty (in percentage points). Members in no political group, and those with fewer than 5 comparable votes in either half, are excluded. Data via the European Parliament Open Data Portal and HowTheyVote.eu.