[UK-CONTEST] Multipliers & Multiplier number for the 15/16th may 144 May Contest on SDV

[Will M0GYZ]

Hi All

Could some explain to me the multiplication system for M1 IE The 
Postcode & Country multipliers
And also which number is it on SDV so i know for the weekend contest on 
15/16th

Thanks
Will M0GYZ