Oranges a shrivelled fruit here
A few years ago I also left Orange, because the signal strength here dropped below working level. Much stonewalling but eventually it became obvious that, in this dense residential area (no significant business traffic, no school, etc, nearby), they had taken a cell out, no doubt because of shortage of spectrum capacity elsewhere. Happened to other places around this urban area, got rumbled by the press, I got out with no penalty and took my number with me, and in a well publicised case the customer was reimbursed and allowed (sic) to cancel the contract. Now use a smaller service provider that buys capacity from Vodaphone - excellent.
And now I out myself (a little) - I'm in Greater Bristol, Orange's HQ area. And the line of bad signal goes through my house, a mate's house and the pub (where we once collared an Orange employee and demonstrated the problem to his great surprise).
The merger just might improve the coverage - on TV I saw an industry expert refer to that in careful words.