I hope they don't go full on cogs, rivets and steam as well. From his criticism of some illustrations of his story Wells clearly didn't see his Martian Tripods that way.
I'd be more worried if it wasn't the BBC TBH, I'm not sure the Steampunk aesthetic ever really broke away from general idea of Sci-fi anachronism to become it's own cliché thing in the minds of the BBC, the influence of Dr. Who and it's everything-and-the-kitchen-sink attitude to genre conventions I think. But British posters would know better than I there.
More likely IMHO the Edwardian main characters will act more like 21 century people with none of the attitudes of the time, which aids identification for non-fans but hurts the whole allegory-of-empire thing Wells was going for and makes recapturing the disquieting, probably verging on horror emotional impact the story probably had on readers of the time very unlikely IMHO.
Quite frankly I'm worried they probably don't aspire to anything more than creating a nostalgic, nationalistic celebration of Britishness fit for a flag waving Brexit era audience.
Which would be particularly irksome as the era produced tons of nationalistic fiction ripe for that treatment but this story is certainly not one of them.
But perhaps I judge too harshly based on the few articles I've read, only time will tell.
And at the very least we'll get aliens and explosions.