IAN Blackford has insisted his threat that SNP MPs will cause “maximum disruption” to Theresa May’s agenda at Westminster over Brexit is not an idle one but declined to say precisely what it would involve. . https://www.heraldscotland.com/news/16974504.ian-blackford-says-snp-threat-of-maximum-disruption-at-westminster-over-brexit-is-no-bluff/