who was the first Balckman in Britain was it Abi Melech a Blackamoor in 1600's

The first Black man to visit Britain must certainly have arrived in
Antiquity, at least during the later Roman Empire.

Mckenzie Heritage: Before the Black Victorians 
http://www.mckenziehpa.com/bv/before.html

"The first mention of a Black African in the historical record is at a
Roman military settlement at Carlisle, in ca. 210 AD. Shortly after,
in the years 253-258 AD, Hadrian's Wall on the Empire's northern
frontier was guarded by a division raised in North Africa."
[...]
"The first authenticated African skeleton in the British
archaeological record is that of a young girl buried at North Elmham
in Norfolk, in ca. 1000 AD."

The Roman Emperor Septimus Severus was born in North Africa (modern
Libya) and went to Britain toward the end of his reign, invading
Scotland. The date mentioned above (AD 210) falls within his lifetime.

SEARCH TERMS

://www.google.com/search?q=Black+African+Roman+Britain&hl=en&lr=&ie=ISO-8859-1

hlabadie-ga

good answer but still a bit vague as to when he arrived

Unfortunately, ca. (circa, Latin for "around") is used for the very
reason that the dates are uncertain and can only be tentatively set
around AD 210.

Septimus Severus arrived in Britian during the winter of 208/209, and
died in York in February 211.

Septimus Severus: The Caledonian Campaign - Caracalla
http://www.stephen.j.murray.btinternet.co.uk/division.htm

If one were open to speculation, one could make a case that Black
Africans probably arrived in Britain much earlier, during the Cornish
tin trade with the Carthaginian colonies in Iberia (Spain). Indigenous
Africans must have formed some part of the crews of those ships,
Carthage being in North Africa. But the earliest attested arrivals are
during the Roman occupation.

Thanks for the tip.

hlabadie-ga