The ACE inhibitors are the first choice for diabetics since they are also sposed to be kidney protective, and many diabetics are put on a low dose of them for starters only for preventative reasons. If however they have actual higher BP, develop a side effect or are otherwise advised to stop taking them, then an ARB will normally be prescribed instead,
Since I got the well known ACE cough, they swapped me to an ARB, however some years later I always got low serum sodium results whenever the GP or hospital did the full range of blood tests us lucky diabetics get at least annually. So by this time, I did have higher BP so needed a drug that would work. Many other BP drugs cause my feet and ankles to swell ridiculously, and when they do that cos that's common, they normally prescribe yet another drug a 'water tablet' to try and negate that. But with low sodium - that's contra indicated.
So I'm currently taking an alpha blocker which is OK mostly, though I still have somewhat puffy ankles and also far higher BP if I don't rest for long enough and also do the slow, deep breathing for long enough, before having it taken.
Far as I know just now, all GP surgeries can only be contacted by telephone at the moment and every single person will be triaged and then called back by a Dr or nurse if the info gleaned shows that the person needs it. That Dr or nurse then establishes whether they need to be seen and if so will arrange the required appointment.