According to the government
legislation.gov.uk/ukpga/200…
The safe countries are ...
(a)Albania,
(b)Austria,
(c)Belgium,
(d)Bulgaria,
(e)Republic of Croatia,
(f)Republic of Cyprus,
(g)Czech Republic,
(h)Denmark,
(i)Estonia,
(j)Finland,
(k)France,
[F3(ka)Georgia,]
(l)Germany,
(m)Greece,
(n)Hungary,
(o)Iceland,
[F4(oa)India,]
(p)Republic of Ireland,
(q)Italy,
(r)Latvia,
(s)Principality of Liechtenstein,
(t)Lithuania,
(u)Luxembourg,
(v)Malta,
(w)Netherlands,
(x)Norway,
(y)Poland,
(z)Portugal,
(z1)Romania,
(z2)Slovak Republic,
(z3)Slovenia,
(z4)Spain,
(z5)Sweden,
(z6)Switzerland.