The problem was resolved quickly and without issue. However, I was charged £70 for a part that Wickes charge £10 for, so can’t recommend them.
Response from Neptune Heating & Plumbing Ltd
Dear Customer, Thank you for your 10 score, however we are very disappointment to read the comments. Neptune pride themselves in customer service and workmanship. We also provide a cost of works before going ahead and from the report from the engineer you was happy to go ahead. We are pleased we resolved the issue quickly for you. Thank you for using Neptune