The oldest Jewish community in Britain is the Spanish and Portuguese Jewish community, which traces back to the 1630s, and was unofficially legitimised in 1656, the date counted by the Jewish community as the re-admittance of the Jews to England (which at the time included Wales). A trickle of Ashkenazi immigration primarily from German countries continued from the late 17th century to the early 19th century, before a second wave of Ashkenazi immigration, a large wave of Ashkenazi Jewish immigration fleeing persecution in the Russian Empire, such as pogroms and the May Laws between 1880 and the imposition of tighter immigration restrictions in 1905. Many German and Polish Jews seeking to escape the Nazi Holocaust arrived in Britain before and after the Second World War. Around 80-90% of British Jews today are Ashkenazi.