A teenager who wants to volunteer as a Childline counsellor when she turns 16 has covered 870 miles in a four-month-long fundraising challenge for the NSPCC. Liz Brennan from Nantgarw started her challenge to run, walk and cycle the equivalent length of the Wales coast path in September, with hopes of raising the £1,600 it costs to fund the training of a Childline counsellor. The GCSE student has been a long-term supporter of the NSPCC and came up with a…