This is the address head office for the mail order arm of the company.
One page gives 015394 31131, but this number is not recognised.
The code for Hawkshead is 015394 with a five digit local number. It shares the first five digits with Kendal, which is 01539. So it's worth searching for both.
With Hawkshead being an area, there are many hits. It appears that its name is
Hawkshead Quality Outdoor Clothing Ltd.
This page is advertising a job vacancy with a telephone number
015394 36633 and fax 015394 36573. The post code is different: LA22 0NT but it's still on Main Street.
The number is also on other pages like
this one and
Touch Lancaster. It is also on 192.com.