18. Subject to paragraph 20 and to the extent that it does not exceed £10·00—
(a)war disablement pension or war widow’s pension or a payment made to compensate for non-payment of such a pension;
(b)a pension paid by the government of a country outside Great Britain and which either—
(i)is analogous to a war disablement pension; or
(ii)is analogous to a war widow’s pension.