Speecha nd gag refleex both improveds when I went on high dose vitamin D. Consider starting with Now softgels 5,000 IU daiuly, then increase until you start to feel a difference. Most MSers end up between 30,000 and 50,000 IU daily. Don’t know if you can get Now brand in the UK. If not, look for one in an olive oil base.
Latest research shows that vitamin D deficiency is the number one risk for MS. You are north of the 40th parallel so the risk is even higher.
Vitamin D fights brain atrophy and lesions. Aids in walking and using arm. Improves energy levels.
You can get a blood test that shows your D level. Safe range given is usually 30-100 ng/ml. But no one has ever taken too much D when blood level is up to 250 ng/ml, and MSers do best at 100-150 ng/ml.
Hope you feel better very soon!