Simplify the following text for a Grade 11 native English-speaking person.
Original: However , the decline of the Scottish Conservatives has not been constantâ '' in the 1992 General Election , the Scottish Conservatives gained a seat in Scotland to become Scotland 's second party , with 11 seats north of the border , and the party is currently second in several Scottish seats that could provide a basis for long-term recovery .
Simplified: However in 1965 , the Scottish Unionist Party merged with the Conservative Party which triggered a decline in Conservative support across Scotland . At the 1987 General Election , the Conservatives were reduced from 21 to 10 Scottish seats , and the party lost all of its Scottish seats in 1997 .