Careerpilot's guide to applying
Careerpilot has lots of information for parents on Higher Education:
Careerpilot - Parent Zone: Higher Education
They also have a section on applying for a HE course.
The Uni Guide has a specific page with advice for parents:
The Uni Guide - Advice for Parents
The Complete University Guide also has a specific page with advice for parents:
Complete University Guide - Application Advice for Parents
The Student Room ‘Parent Room’ – online forums where you can ask questions of other parents specifically about university and UCAS applications:
The Student Room
* Please note that the comments made in The Student Room are solely the opinions of specific individuals and are not opinions of the WIN