Hi Alan ~~ A BIG WELCOME TO THE T BAR FORUM, you are in good hands here and it is good to see that you have caught the MG bug, you will be spending money on your pride and joy before you know it
Your car looks very nice and is a lovely colour.
If a Head Gasket replacement job on an F or TF is done properley it needs only to be done once. Rough Luck (Jon Norris) Saint Russell (Russell Walsh) or Dazlightyear, to name a few. Ray will tell you that some numpty "bodged" the first one on his TF. one of the essential items is a water level sensor kit, it wont stop HGF but will give you early warning of water loss which could end up with the dreaded job being required. Welcome again