Have done mine at 4 forces, Heathrow. I don't know if they are still in business, but they were cheap, and the MCC Course was really interesting
Look for "discount" MCC advertisement in aviation magazine, and go for the cheaper. That's just a line on your resume.
Some people tends to go for MCC on 737 Sim or HS125 ...What's the point ? I don't think any airline recruitment manager will confuse a MCC with a Type rating.
Even the cheapest MCC is too much money out of your wallet !
