As a tea lover, I’d love to know what’s the best type of british tea in your opinion? for £150 budget

OK, standard British tea as a rule is a blend of assam, Ceylon, and Kenyan tea. Ignore Kenyan, it’s cheap filler tea that adds strength but not much else. Ceylon and assam are both worth investigating. They hold up well to milk (and sugar if you like that) but will tend to taste a bit ‘cleaner’ for want of a better word. I use Assam as my everyday tea. You’ll find it in the tea section for any supermarket and unless you’re going for very high grade (large leaf) Assam there’s little point in paying more for it IMO. It’s always worth trying Russian caravan. It’s a lighter version of Lapsang Souchong (smoky Chinese tea) essentially. You may have to go to a specialist tea shop to get it, but most specialist tea shops will sell it. Again, any brand really - it’s going to be broadly similar. Darjeeling is a good one if you like early grey - “the champagne of teas” it’s called. I’d try both a “first flush Darjeeling” and “second flush Darjeeling”. Typically these will be single origin / plantation. You could get them from the same plantation or different ones - there are differences but they’re fairly small mostly. However first and second flush do taste different - first tends to be more expensive (but great as a posh cuppa), second flush cheaper. You’ll need to go to specialist tea shops to get first/second flush Darjeeling, but you can buy (usually second flush) Darjeeling in most supermarkets if you can’t find one. It will be the most expensive tea in the list if you get it from a tea shop, but it’s worth it. Chinese teas tend to be lighter than Indian (all of the above are either Indian or a blend that contains Indian tea). Keemun is pretty nice, as is yunnan. Both are sometimes available in supermarkets, you may find one. I’d get one from the two - they’re just fairly standard Chinese black tea, there are differences but they’re small. You’ll definitely find them in specialist tea shops.  You can spend insane amounts of money on oolong. I’d maybe consider getting a cheap(er) one. They’re a bit indulgent, but they’re a notably different style to the above. You’ll most likely need a specialist tea shop but you do occasionally find one in supermarkets. Japanese green tea. Get one, they’re IMO by far the best green tea. Go sencha to begin with, they’re good without being overly expensive. If you do get in to Japanese teas, gyokuro is where it’s at. It’s amazing. They have much shorter brew times than standard tea (like 60s to 120 seconds) and always drink without milk or sugar. But my word, at the top end Japanese green tea is a whole new ballgame, and ridiculously good (if expensive). Best find out if you like it first though, and sencha is a great place to start.