We got our private bloods done (thanks to Blue Horizons the GP now listened to us)! Dad B12 was in 700s but we explained that this was due to use of sublinguals. His folate levels were very low and I guess this is part of the reason that the sublinguals were not having any effect. Will be chasing the hospital today to see that they start him on folic acid supplementation. I am also pressing them to check his adrenal function as his blood pressure is also very low. At least something is being done which is a blessing! Many thanks for all the support we get on this site - you guys are amazing!