‘I’m expecting an offer of around £70,000’ – don’t count your chickens before they hatch.
Many benefits (pay outs) from redundancy are on beneficial terms vs the legal minimum that your employer need pay, but I’d be surprised if you get anywhere near £70k.
Redundancy pay is normally limited to a maximum of 20 years service, with 1 weeks pay for every year of service between the ages of 22 and 41, and 1 ½ weeks pay for every year of service over the age of 41. Therefore the maximum number of weeks pay would be for someone who qualified for 20 years service after the age of 41, at 30 weeks pay.
Now for the real downer; for the purposes of calculating your pay out, your weekly pay may be capped at £544 – resulting in a maximum redundancy pay out of £16,320.
But many firms do offer terms better than the legal minimum (for instance, taking into consideration your actual weekly pay and not the capped figure) – but they are under no obligation to do so unless your terms of employment state otherwise.
See here for more info:-
https://www.gov.uk/redundancy-your-rights/redundancy-pay