What information it has on how many breeding pairs of gull there have been in each of the last 10 years, broken down by species.

Seabird 2000 which took place between 1998 and 2002 was the last national census of seabird populations. Further details of Seabird 2000 can be found at: http://jncc.defra.gov.uk/page-3120
Between national censuses, the Seabird Monitoring Programme (SMP) collects data on breeding numbers and breeding success of 26 species of seabirds which enables populations to be estimated, where there is sufficient data to do so. Further details of the SMP and the data held can be found at: http://jncc.defra.gov.uk/page-1550
For the gull species the following estimates can be derived;
Gull Species
Seabird 2000 population estimate of breeding pairs for Scotland
% Population change between Seabird 2000 population estimate and 2012
Estimated 2012 population of breeding pairs for Scotland
Black-headed gull
43,191
n/a
n/a
Common gull
20,467
-36
c. 13,000
Lesser black-backed gull
25,057
n/a
n/a
Herring gull
72,130
-20
c. 58,000
Great black-backed gull
14,776
-60
c. 6,000
Black-legged kittiwake
282,213
-59
c. 116,000
Notes:
All figures refer to the number of breeding pairs.
Figures quoted for 2012 are derived estimates, not actual population counts.
The data for common gull refers to coastal populations only (which held only 42% of the total population during Seabird 2000).