Missing black and white small cat/kitten <simi>lives beside liddles

Missin black and white cat/kitten <simba> or <simi> simi is only 9 months old and is one of two kittens he is very shy and nervous he doesnt like being alone and he only ever goes out for 60mins at a time he hasent been seen since 5pm last night around liddles area is where he is from ,his brother cat is relentlessley searching for him as they are never apart and are always within calling distance we are very very worried about simi as its totally out of character for him to be away for so long we are worried sick about him please if you have seen him please could you get in touch wick area ,poultney,we reside beside liddles in wick,contact 01955603572 07789478969 thanks lynsey