Did you solve it? Take the Ada Lovelace challenge (Solution part II)

The second part of the solution to the tricky teaser set by the world's first computer programmer

The first part is here

Okay, so here we're solving the following grid. Each square has a number from 1 to 7. No digit appears more than once in each row or column. The digits must obey the inequalities and if there is a circled number, the two digits either side must differ by that number.