First line should say-
This is the last Will and testamet of me Angela... and rest of your wording is fine.
1. should read "to be the sole executor of this my Will"
You should appoint 2 people as Executors on the second death- you don't have to be it is advisable, and would avoid problems if the Dr had died before the survivor of you.
2. should read "my said husband" to "him" absolutely.
3. should read- if my said Husband dies before me or does not survive me for a period of 28 days or if for any reason the gift to him fails then I give all my estate...
("or if for any reason the gft to him" wording is to cover the unlikley event that you divorce before your death).
4-5 Importantly, you must include all the legacies mentioned in the schedule within your Will itself ie list them all in your Will. It is not sufficient for you just to mention them by reference to any in any schedule, as these legacies would be deemed not legally enforceable. Also, what if the Executor can't find the Schedule/decides not to implement your wishes in the legacies mentioned in the Schedule. So, please list all these legacies at clauses 4 and 5, to avoid any potential problems.
6. should read- "to divide the remainder into 6 equal shares:-"
"as to four shares for my sister in law A absolutely but if she dies before me then to such of her daughters B C and D who survive me and if more than one in equal shares absolutely"
You should also list the names of the children, so the Executors know exactly who is to benefit.
"as to two shares for C and D and if more than one in equal shares absolutely provided that if both C and D have died before me then to their children E F and G who survive me and if more than one in equal shares absolutely".
Again, please list the names of the children.
There is no need to refer to any of the above beneficiaries "surviving me for a period of 28 days" as this is only to cover husband/wife legacies to each other- to revent double administration in the case husband and wife die in a common accident.
Attestation clause- should read "in the presence of her" in your Will and "in the presence of him" in your Husband's Will.
Overall, I would give you 8/10! Most important thing to consider is to appoint a 2nd Executor on the survivor's death and you do need to include the legacies in the Will itself.
I hope this assists.