No, L21 already existed when the Proto-Celts reached the Alps. It is likely that a founder effect from the Celtic colonisers made it the dominant subclade in the British Isles.
Ditto.2-Is that right also that R1b M167 has been originated in spain and not in central europe?
On my R1b migration map, S116 does not mean S116*, but S116 + possibly various subclades under it. I don't have enough space to write all the possible subclades (and anyway there isn't enough data to be sure).3-Is that right that R1b S116 which went to scandinavia and greece(dorians) during the late halstatt was only s116 with out any mutaions or was mostly R1b S28?
La Tène is merely the continuation of Hallstatt. Archaeologists gave two different names because the centre of the culture moved west during the Iron Age.4-What is the different between halstatt and la tene cultures? were they both in the same region and the same time? and were they mostly R1b S28?
Bronze working means making objects or weapons in bronze. It is called the Bronze Age. In Europe, Iron working developed in the late Hallstatt period. The Roman empire is also part of the Iron Age.5-you have told me lately that R1b S28 associated with bronze working and not associated with languages ,could you tell me please what does bronze working mean?
My theory is that the Proto-Italo-Celts brought bronze-working with them from The Black Sea/Anatolia/Caucasus region to Central Europe, and from there to Britain, France, Iberia, Italy, etc. Bronze Age suddenly appears in Britain and Iberia around 4200 years ago, which is what makes me think that R1b arrived around that time. Given that most of the British S28 is found in eastern England, I doubt that S28 was part of the original migration. Most of them must have been M269, S116 and L21 (and maybe some subclades of L21 like M37 which is found in Germany, Britain and Ireland as well).6- Is that right that R1b L21 was there in britain before halstatt S28 migration? and is that right that S28 has bben associated with bronze working there also?
This question is to vague to answer. I'd say that many (but not all) East English should be closer to the Dutch and North-West Germans, while many West English are probably closer to the Welsh. But that's just an informed guess.7-Is that right that English (including eastern english and western english) are closer to welsh ,scottish and Irish in autosomal dna and mt-dna than to Germans?